From 5f51ac7d2270169fdd6cfeb6d984d991c94fd220 Mon Sep 17 00:00:00 2001
From: Pavel Lopatin <lopatyn1244@gmail.com>
Date: Sun, 3 Aug 2025 20:41:56 +0300
Subject: [PATCH] init

---
 .gitignore                                    | 165 ++++++++++++++++++
 README.md                                     |  48 +++++
 docker-compose.local.yaml                     |  25 +++
 docker-compose.yaml                           |  46 +++++
 nginx/nginx.conf                              |  58 ++++++
 src/.env.example                              |   6 +
 src/Dockerfile                                |  25 +++
 src/alembic.ini                               | 147 ++++++++++++++++
 src/apps/__init__.py                          |   0
 src/apps/initializer.py                       |  33 ++++
 src/apps/main.py                              |  21 +++
 src/apps/users/__init__.py                    |   0
 src/apps/users/admin.py                       |  45 +++++
 src/apps/users/scripts/__init__.py            |   0
 src/apps/users/scripts/create_user.py         |  42 +++++
 src/core/__init__.py                          |   0
 src/core/db_config.py                         |  34 ++++
 src/core/env.py                               |  15 ++
 src/crypto/__init__.py                        |   0
 src/crypto/password.py                        |  36 ++++
 src/db/__init__.py                            |   6 +
 src/db/migrations/README                      |   1 +
 src/db/migrations/env.py                      |  99 +++++++++++
 src/db/migrations/script.py.mako              |  28 +++
 .../migrations/versions/01c1151f5b52_init.py  |  32 ++++
 .../versions/be9893939a59_add_users.py        |  57 ++++++
 src/db/models/__init__.py                     |   0
 src/db/models/base.py                         |   5 +
 src/db/models/user.py                         |  50 ++++++
 src/db/providers.py                           |  34 ++++
 src/db/types/__init__.py                      |   0
 src/db/types/fields.py                        |  63 +++++++
 src/helpers/__init__.py                       |   0
 src/helpers/admin/__init__.py                 |   0
 src/helpers/admin/auth.py                     |  60 +++++++
 src/helpers/admin/base/__init__.py            |   0
 src/helpers/admin/base/views.py               |  17 ++
 src/helpers/admin/enums.py                    |   8 +
 src/helpers/logging.py                        |  34 ++++
 src/repositories/__init__.py                  |   0
 src/repositories/base_repository.py           | 163 +++++++++++++++++
 src/repositories/user_repository.py           |  28 +++
 src/requirements.txt                          |  10 ++
 43 files changed, 1441 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 docker-compose.local.yaml
 create mode 100644 docker-compose.yaml
 create mode 100644 nginx/nginx.conf
 create mode 100644 src/.env.example
 create mode 100644 src/Dockerfile
 create mode 100644 src/alembic.ini
 create mode 100644 src/apps/__init__.py
 create mode 100644 src/apps/initializer.py
 create mode 100644 src/apps/main.py
 create mode 100644 src/apps/users/__init__.py
 create mode 100644 src/apps/users/admin.py
 create mode 100644 src/apps/users/scripts/__init__.py
 create mode 100644 src/apps/users/scripts/create_user.py
 create mode 100644 src/core/__init__.py
 create mode 100644 src/core/db_config.py
 create mode 100644 src/core/env.py
 create mode 100644 src/crypto/__init__.py
 create mode 100644 src/crypto/password.py
 create mode 100644 src/db/__init__.py
 create mode 100644 src/db/migrations/README
 create mode 100644 src/db/migrations/env.py
 create mode 100644 src/db/migrations/script.py.mako
 create mode 100644 src/db/migrations/versions/01c1151f5b52_init.py
 create mode 100644 src/db/migrations/versions/be9893939a59_add_users.py
 create mode 100644 src/db/models/__init__.py
 create mode 100644 src/db/models/base.py
 create mode 100644 src/db/models/user.py
 create mode 100644 src/db/providers.py
 create mode 100644 src/db/types/__init__.py
 create mode 100644 src/db/types/fields.py
 create mode 100644 src/helpers/__init__.py
 create mode 100644 src/helpers/admin/__init__.py
 create mode 100644 src/helpers/admin/auth.py
 create mode 100644 src/helpers/admin/base/__init__.py
 create mode 100644 src/helpers/admin/base/views.py
 create mode 100644 src/helpers/admin/enums.py
 create mode 100644 src/helpers/logging.py
 create mode 100644 src/repositories/__init__.py
 create mode 100644 src/repositories/base_repository.py
 create mode 100644 src/repositories/user_repository.py
 create mode 100644 src/requirements.txt

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1634938
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,165 @@
+### Python template
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+.venv
+.idea
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/latest/usage/project/#working-with-version-control
+.pdm.toml
+.pdm-python
+.pdm-build/
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..544df24
--- /dev/null
+++ b/README.md
@@ -0,0 +1,48 @@
+# Template sqlalchemy-template
+
+This guide covers setting up the project locally for development and testing purposes.
+
+## Project Setup
+
+### Virtual Environment
+
+It's recommended to use a Python virtual environment to isolate dependencies:
+
+```
+python -m venv venv
+. venv/bin/activate
+```
+
+### Environment Variables
+
+Copy `.env.example` to `.env` and update any credentials, settings, etc.
+
+### Install Dependencies
+
+`pip install -r src/requirements.txt`
+
+### Initialize Database
+
+Create migrations from updated database schema:
+
+`alembic revision --autogenerate -m "<migrations name>"`
+
+Run migrations to setup database schema:
+
+`alembic upgrade head`
+
+###
+
+## Start Local Development
+
+### Start database and other services with docker
+
+`docker-compose up -d`
+
+### Run app
+
+`uvicorn app.main:app --reload`
+
+### Create superuser
+
+`python apps/users/scripts/create_user.py -un admin -al 3 -pass adminpass` 
diff --git a/docker-compose.local.yaml b/docker-compose.local.yaml
new file mode 100644
index 0000000..6f0c2b9
--- /dev/null
+++ b/docker-compose.local.yaml
@@ -0,0 +1,25 @@
+services:
+  postgres:
+    image: postgres:17.5-alpine
+    container_name: postgres
+    command:
+      - "postgres"
+      - "-c"
+      - "max_connections=1000"
+      - "-c"
+      - "statement_timeout=${DB_STATEMENT_TIMEOUT:-300s}"
+      - "-c"
+      - "idle_in_transaction_session_timeout=${DB_IDLE_IN_TRANSACTION_SESSION_TIMEOUT:-300s}"
+    volumes:
+      - postgresql-data:/var/lib/postgresql/data
+    restart: on-failure
+    env_file:
+      - src/.env
+    ports:
+      - "127.0.0.1:5432:5432"
+
+
+volumes:
+  postgresql-data:
+
+
diff --git a/docker-compose.yaml b/docker-compose.yaml
new file mode 100644
index 0000000..c373b74
--- /dev/null
+++ b/docker-compose.yaml
@@ -0,0 +1,46 @@
+services:
+  nginx:
+    command: nginx -g "daemon off;"
+    depends_on:
+      - api
+    image: nginx:alpine
+    restart: on-failure
+    volumes:
+      - ./nginx/nginx.conf:/etc/nginx/nginx.conf
+    ports:
+      - "127.0.0.1:8000:8000"
+
+  postgres:
+    image: postgres:17.5-alpine
+    container_name: postgres
+    command:
+      - "postgres"
+      - "-c"
+      - "max_connections=1000"
+      - "-c"
+      - "statement_timeout=${DB_STATEMENT_TIMEOUT:-300s}"
+      - "-c"
+      - "idle_in_transaction_session_timeout=${DB_IDLE_IN_TRANSACTION_SESSION_TIMEOUT:-300s}"
+    volumes:
+      - postgresql-data:/var/lib/postgresql/data
+    restart: on-failure
+    env_file:
+      - src/.env
+
+  api:
+    build:
+      context: src
+      dockerfile: ./Dockerfile
+    restart: on-failure
+    command: bash -c "alembic upgrade head; uvicorn apps.main:app --host 0.0.0.0 --port 8000 --reload"
+    depends_on:
+      - postgres
+    volumes:
+      - ./src/:/app/
+    env_file:
+      - src/.env
+
+volumes:
+  postgresql-data:
+
+
diff --git a/nginx/nginx.conf b/nginx/nginx.conf
new file mode 100644
index 0000000..9b14a17
--- /dev/null
+++ b/nginx/nginx.conf
@@ -0,0 +1,58 @@
+user  nginx;
+worker_processes  1;
+
+error_log  /var/log/nginx/error.log warn;
+pid        /var/run/nginx.pid;
+
+events {
+    worker_connections  1024;
+}
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+    sendfile        off;
+    keepalive_timeout  5s;
+    client_max_body_size 200M;
+
+    map $http_upgrade $connection_upgrade {
+        default upgrade;
+        ''      close;
+    }
+
+    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" $status '
+        '$body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for"';
+    access_log  /var/log/nginx/access.log  main;
+
+
+    upstream api {
+        server api:8000;
+    }
+
+    server {
+        listen 8000;
+        charset utf-8;
+
+        server_name _;
+
+        location / {
+            proxy_pass http://api;
+            proxy_redirect     off;
+            proxy_set_header   Host api;
+            proxy_set_header   X-Real-IP $remote_addr;
+            proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header   X-Forwarded-Proto $scheme;
+            proxy_set_header   X-Forwarded-Host $server_name;
+        }
+
+        location /admin {
+            proxy_pass http://api/admin;
+            proxy_redirect     off;
+            proxy_set_header   Host $http_host;
+            proxy_set_header   X-Real-IP $remote_addr;
+            proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header   X-Forwarded-Proto $scheme;
+            proxy_set_header   X-Forwarded-Host $server_name;
+        }
+    }
+}
diff --git a/src/.env.example b/src/.env.example
new file mode 100644
index 0000000..7780f1f
--- /dev/null
+++ b/src/.env.example
@@ -0,0 +1,6 @@
+POSTGRES_NAME=postgres
+POSTGRES_USER=postgres
+POSTGRES_PASSWORD=postgres
+POSTGRES_HOST=postgres
+POSTGRES_PORT=5432
+ADMIN_SECRET_KEY=somesecret
\ No newline at end of file
diff --git a/src/Dockerfile b/src/Dockerfile
new file mode 100644
index 0000000..8625aa8
--- /dev/null
+++ b/src/Dockerfile
@@ -0,0 +1,25 @@
+FROM python:3.13-slim
+
+WORKDIR /app
+
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+ENV OPENBLAS_NUM_THREADS=1
+ENV PYTHONPATH=/app
+
+RUN apt-get update --fix-missing && apt-get install -y --no-install-recommends \
+    build-essential \
+    gcc \
+    libffi-dev \
+    libpq-dev \
+    curl \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+
+COPY requirements.txt .
+
+RUN pip install --upgrade pip \
+    && pip install --no-cache-dir -r requirements.txt
+
+COPY .. .
diff --git a/src/alembic.ini b/src/alembic.ini
new file mode 100644
index 0000000..662a473
--- /dev/null
+++ b/src/alembic.ini
@@ -0,0 +1,147 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts.
+# this is typically a path given in POSIX (e.g. forward slashes)
+# format, relative to the token %(here)s which refers to the location of this
+# ini file
+script_location = db/migrations
+
+# template used to generate migration file names; The default value is %%(rev)s_%%(slug)s
+# Uncomment the line below if you want the files to be prepended with date and time
+# see https://alembic.sqlalchemy.org/en/latest/tutorial.html#editing-the-ini-file
+# for all available tokens
+# file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.  for multiple paths, the path separator
+# is defined by "path_separator" below.
+prepend_sys_path = .
+
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python>=3.9 or backports.zoneinfo library and tzdata library.
+# Any required deps can installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to ZoneInfo()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to <script_location>/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "path_separator"
+# below.
+# version_locations = %(here)s/bar:%(here)s/bat:%(here)s/alembic/versions
+
+# path_separator; This indicates what character is used to split lists of file
+# paths, including version_locations and prepend_sys_path within configparser
+# files such as alembic.ini.
+# The default rendered in new alembic.ini files is "os", which uses os.pathsep
+# to provide os-dependent path splitting.
+#
+# Note that in order to support legacy alembic.ini files, this default does NOT
+# take place if path_separator is not present in alembic.ini.  If this
+# option is omitted entirely, fallback logic is as follows:
+#
+# 1. Parsing of the version_locations option falls back to using the legacy
+#    "version_path_separator" key, which if absent then falls back to the legacy
+#    behavior of splitting on spaces and/or commas.
+# 2. Parsing of the prepend_sys_path option falls back to the legacy
+#    behavior of splitting on spaces, commas, or colons.
+#
+# Valid values for path_separator are:
+#
+# path_separator = :
+# path_separator = ;
+# path_separator = space
+# path_separator = newline
+#
+# Use os.pathsep. Default configuration used for new projects.
+path_separator = os
+
+# set to 'true' to search source files recursively
+# in each "version_locations" directory
+# new in Alembic version 1.10
+# recursive_version_locations = false
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# database URL.  This is consumed by the user-maintained env.py script only.
+# other means of configuring database URLs may be customized within the env.py
+# file.
+sqlalchemy.url = driver://user:pass@localhost/dbname
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# lint with attempts to fix using "ruff" - use the module runner, against the "ruff" module
+# hooks = ruff
+# ruff.type = module
+# ruff.module = ruff
+# ruff.options = check --fix REVISION_SCRIPT_FILENAME
+
+# Alternatively, use the exec runner to execute a binary found on your PATH
+# hooks = ruff
+# ruff.type = exec
+# ruff.executable = ruff
+# ruff.options = check --fix REVISION_SCRIPT_FILENAME
+
+# Logging configuration.  This is also consumed by the user-maintained
+# env.py script only.
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARNING
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARNING
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S
diff --git a/src/apps/__init__.py b/src/apps/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/apps/initializer.py b/src/apps/initializer.py
new file mode 100644
index 0000000..ade4ef3
--- /dev/null
+++ b/src/apps/initializer.py
@@ -0,0 +1,33 @@
+from typing import Any
+
+from fastapi import FastAPI
+from sqladmin.application import Admin
+
+from apps.users.admin import UserAdmin, UserSessionAdmin
+from core.env import ADMIN_SECRET_KEY
+from helpers.admin.auth import AdminAuth
+
+
+def init(app: FastAPI, engine: Any):
+    """
+    Init routers and etc.
+    :return:
+    """
+    init_admin(app, engine)
+    init_routers(app)
+
+
+def init_routers(app: FastAPI):
+    """
+    Initialize routers defined in `app.api`
+    :param app:
+    :return:
+    """
+    pass
+
+
+def init_admin(app: FastAPI, engine: Any):
+    authentication_backend = AdminAuth(secret_key=ADMIN_SECRET_KEY)
+    admin = Admin(app=app, engine=engine, authentication_backend=authentication_backend)
+    admin.add_view(UserAdmin)
+    admin.add_view(UserSessionAdmin)
diff --git a/src/apps/main.py b/src/apps/main.py
new file mode 100644
index 0000000..6c137a8
--- /dev/null
+++ b/src/apps/main.py
@@ -0,0 +1,21 @@
+from fastapi import FastAPI
+from starlette.middleware.cors import CORSMiddleware
+
+from db import db_conn
+from helpers.logging import logger
+from .initializer import init
+
+
+app = FastAPI()
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["POST"],
+    allow_headers=["*"],
+)
+
+logger.info("Starting application initialization...")
+init(app, db_conn.engine)
+logger.info("Initialization...")
diff --git a/src/apps/users/__init__.py b/src/apps/users/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/apps/users/admin.py b/src/apps/users/admin.py
new file mode 100644
index 0000000..0831927
--- /dev/null
+++ b/src/apps/users/admin.py
@@ -0,0 +1,45 @@
+from fastapi import Request
+
+from db.models.user import User, UserSession
+from helpers.admin.auth import check_accesses_level
+from helpers.admin.base.views import CustomModelView
+from helpers.admin.enums import AccessLevel
+
+
+class UserAdmin(CustomModelView, model=User):
+    column_exclude_list = ["sessions", "password"]
+    column_details_exclude_list = ["sessions"]
+    form_excluded_columns = ["sessions"]
+
+    category = "users"
+
+    async def on_model_change(self, data, model, is_created: bool):
+        password = data.get("password")
+        if password == "<PasswordHash>":
+            data.pop("password")
+        await super().on_model_change(data, model, is_created)
+
+    def is_accessible(self, request: Request) -> bool:
+        return check_accesses_level(
+            AccessLevel.administrator, request.session["access_level"]
+        )
+
+    def is_visible(self, request: Request) -> bool:
+        return check_accesses_level(
+            AccessLevel.administrator, request.session["access_level"]
+        )
+
+
+class UserSessionAdmin(CustomModelView, model=UserSession):
+    column_list = "__all__"
+    category = "auth"
+
+    def is_accessible(self, request: Request) -> bool:
+        return check_accesses_level(
+            AccessLevel.administrator, request.session["access_level"]
+        )
+
+    def is_visible(self, request: Request) -> bool:
+        return check_accesses_level(
+            AccessLevel.administrator, request.session["access_level"]
+        )
diff --git a/src/apps/users/scripts/__init__.py b/src/apps/users/scripts/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/apps/users/scripts/create_user.py b/src/apps/users/scripts/create_user.py
new file mode 100644
index 0000000..8800528
--- /dev/null
+++ b/src/apps/users/scripts/create_user.py
@@ -0,0 +1,42 @@
+import argparse
+import asyncio
+
+from db import db_conn
+from db.models.user import User
+from helpers.logging import logger
+from repositories.user_repository import UserRepository
+
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-un", "--username", help="user name", required=True)
+parser.add_argument(
+    "-al", "--access_level", type=int, help="access level", required=False
+)
+parser.add_argument("-pass", "--password", type=str, help="password", required=True)
+
+args = parser.parse_args()
+
+
+async def main():
+    username = args.username
+    async with db_conn.async_session_manager() as session:
+        user_repo = UserRepository(session)
+        user = await user_repo.get_by_username(username)
+        if user:
+            await user_repo.update(
+                user.id, password=args.password.encode(), access_level=args.access_level
+            )
+            logger.info(f"User {username} updated! access_level: {args.access_level}")
+        else:
+            await user_repo.create(
+                User(
+                    password=args.password,
+                    access_level=args.access_level,
+                    username=username,
+                )
+            )
+            logger.info(f"User {username} created! access_level: {args.access_level}")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())
diff --git a/src/core/__init__.py b/src/core/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/core/db_config.py b/src/core/db_config.py
new file mode 100644
index 0000000..e10d705
--- /dev/null
+++ b/src/core/db_config.py
@@ -0,0 +1,34 @@
+from pathlib import Path
+
+from pydantic import Field, computed_field
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+base_path = Path(__file__).resolve().parent.parent
+
+
+class DataBaseSettings(BaseSettings):
+    model_config = SettingsConfigDict(
+        env_file=base_path / ".env",
+        env_ignore_empty=True,
+        extra="ignore",
+    )
+    db_host: str = Field(alias="POSTGRES_HOST")
+    db_port: int = Field(alias="POSTGRES_PORT")
+    db_name: str = Field(alias="POSTGRES_NAME")
+    db_user: str = Field(alias="POSTGRES_USER")
+    db_pass: str = Field(alias="POSTGRES_PASSWORD")
+
+    @computed_field
+    @property
+    def db_url(self) -> str:
+        return f"postgresql+asyncpg://{self.db_user}:{self.db_pass}@{self.db_host}:{self.db_port}/{self.db_name}"
+
+
+    @computed_field
+    @property
+    def sync_db_url(self) -> str:
+        return f"postgresql://{self.db_user}:{self.db_pass}@{self.db_host}:{self.db_port}/{self.db_name}"
+
+
+db_settings = DataBaseSettings()
diff --git a/src/core/env.py b/src/core/env.py
new file mode 100644
index 0000000..4656110
--- /dev/null
+++ b/src/core/env.py
@@ -0,0 +1,15 @@
+import os
+
+
+POSTGRES_HOST = os.environ.get('POSTGRES_HOST', 'localhost')
+POSTGRES_PORT = os.environ.get('POSTGRES_PORT', '5432')
+POSTGRES_NAME = os.environ.get('POSTGRES_NAME', 'postgres')
+POSTGRES_USER = os.environ.get('POSTGRES_USER', 'postgres')
+POSTGRES_PASSWORD = os.environ.get('POSTGRES_PASSWORD', 'postgres')
+
+LOG_LEVEL = os.getenv("LOG_LEVEL", "INFO").upper()
+LOG_FORMAT = os.getenv(
+    "LOG_FORMAT", "[%(levelname)s]: %(message)s | %(pathname)s:%(funcName)s:%(lineno)d"
+)
+
+ADMIN_SECRET_KEY = os.environ.get("ADMIN_SECRET_KEY")
diff --git a/src/crypto/__init__.py b/src/crypto/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/crypto/password.py b/src/crypto/password.py
new file mode 100644
index 0000000..5bc8ed5
--- /dev/null
+++ b/src/crypto/password.py
@@ -0,0 +1,36 @@
+import bcrypt
+from sqlalchemy.ext.mutable import Mutable
+
+
+class PasswordHash(Mutable):
+    def __init__(self, hash_: str, rounds: int = 12):
+        self.hash = str(hash_)
+        self.rounds = rounds
+
+    def __repr__(self):
+        """Simple object representation."""
+        return "<{}>".format(type(self).__name__)
+
+    @classmethod
+    def coerce(cls, key: str, value):
+        """Ensure that loaded values are PasswordHashes."""
+        if isinstance(value, PasswordHash):
+            return value
+        return super(PasswordHash, cls).coerce(key, value)
+
+    @classmethod
+    def new(cls, password: str, rounds: int | None = None):
+        """Returns a new PasswordHash object for the given password and rounds."""
+        return cls(cls._new(password, rounds))
+
+    @staticmethod
+    def _new(password: str, rounds: int | None = None):
+        """Returns a new crypt hash for the given password and rounds."""
+        salt = bcrypt.gensalt(rounds)
+        hashed = bcrypt.hashpw(password.encode(), salt)
+        return hashed.decode()
+
+    def _rehash(self, password: str):
+        """Recreates the internal hash and marks the object as changed."""
+        self.hash = self._new(password, self.rounds)
+        self.changed()
diff --git a/src/db/__init__.py b/src/db/__init__.py
new file mode 100644
index 0000000..f81eef9
--- /dev/null
+++ b/src/db/__init__.py
@@ -0,0 +1,6 @@
+from core.db_config import db_settings
+from .models.user import *
+from .providers import DataAsyncProvider
+
+
+db_conn = DataAsyncProvider(db_settings.db_url)
diff --git a/src/db/migrations/README b/src/db/migrations/README
new file mode 100644
index 0000000..98e4f9c
--- /dev/null
+++ b/src/db/migrations/README
@@ -0,0 +1 @@
+Generic single-database configuration.
\ No newline at end of file
diff --git a/src/db/migrations/env.py b/src/db/migrations/env.py
new file mode 100644
index 0000000..eb2eaf5
--- /dev/null
+++ b/src/db/migrations/env.py
@@ -0,0 +1,99 @@
+import asyncio
+import sys
+from logging.config import fileConfig
+from os.path import abspath, dirname
+
+from alembic import context
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+from sqlalchemy.engine import Connection
+from sqlalchemy.ext.asyncio import AsyncEngine
+
+from core.db_config import db_settings
+from db.models.base import Base
+
+
+sys.path.insert(0, dirname(dirname(dirname(abspath(__file__)))))
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the core file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+config.set_main_option("sqlalchemy.url", db_settings.db_url)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+target_metadata = Base.metadata
+
+
+# other values from the core, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = core.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+        compare_type=True
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def do_run_migrations(connection: Connection) -> None:
+    context.configure(connection=connection,
+                      target_metadata=target_metadata, compare_type=True)
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+async def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = AsyncEngine(
+        engine_from_config(
+            config.get_section(config.config_ini_section),
+            prefix="sqlalchemy.",
+            poolclass=pool.NullPool,
+            future=True,
+        )
+    )
+
+    async with connectable.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+
+    await connectable.dispose()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    asyncio.run(run_migrations_online())
diff --git a/src/db/migrations/script.py.mako b/src/db/migrations/script.py.mako
new file mode 100644
index 0000000..1101630
--- /dev/null
+++ b/src/db/migrations/script.py.mako
@@ -0,0 +1,28 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, Sequence[str], None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    ${downgrades if downgrades else "pass"}
diff --git a/src/db/migrations/versions/01c1151f5b52_init.py b/src/db/migrations/versions/01c1151f5b52_init.py
new file mode 100644
index 0000000..a09fda6
--- /dev/null
+++ b/src/db/migrations/versions/01c1151f5b52_init.py
@@ -0,0 +1,32 @@
+"""init
+
+Revision ID: 01c1151f5b52
+Revises: 
+Create Date: 2025-08-03 19:37:01.619206
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '01c1151f5b52'
+down_revision: Union[str, Sequence[str], None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/src/db/migrations/versions/be9893939a59_add_users.py b/src/db/migrations/versions/be9893939a59_add_users.py
new file mode 100644
index 0000000..8464acf
--- /dev/null
+++ b/src/db/migrations/versions/be9893939a59_add_users.py
@@ -0,0 +1,57 @@
+"""add_users
+
+Revision ID: be9893939a59
+Revises: 01c1151f5b52
+Create Date: 2025-08-03 19:39:48.172257
+
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+from db import Password
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'be9893939a59'
+down_revision: Union[str, Sequence[str], None] = '01c1151f5b52'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('users',
+                    sa.Column('id', sa.BigInteger(), nullable=False),
+                    sa.Column('username', sa.String(length=50), nullable=False),
+                    sa.Column('password', Password(length=156), nullable=False),
+                    sa.Column('access_level',
+                              sa.Enum('user', 'support', 'moderator', 'administrator', name='accesslevel'),
+                              nullable=True),
+                    sa.PrimaryKeyConstraint('id'),
+                    sa.UniqueConstraint('username')
+                    )
+    op.create_index(op.f('ix_users_id'), 'users', ['id'], unique=True)
+    op.create_table('user_sessions',
+                    sa.Column('token', sa.UUID(), nullable=False),
+                    sa.Column('user_id', sa.BigInteger(), nullable=False),
+                    sa.Column('created_at', sa.DateTime(), nullable=False),
+                    sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
+                    sa.PrimaryKeyConstraint('token')
+                    )
+    op.create_index(op.f('ix_user_sessions_token'), 'user_sessions', ['token'], unique=False)
+    op.create_index(op.f('ix_user_sessions_user_id'), 'user_sessions', ['user_id'], unique=False)
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_user_sessions_user_id'), table_name='user_sessions')
+    op.drop_index(op.f('ix_user_sessions_token'), table_name='user_sessions')
+    op.drop_table('user_sessions')
+    op.drop_index(op.f('ix_users_id'), table_name='users')
+    op.drop_table('users')
+    # ### end Alembic commands ###
diff --git a/src/db/models/__init__.py b/src/db/models/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/db/models/base.py b/src/db/models/base.py
new file mode 100644
index 0000000..f3b4871
--- /dev/null
+++ b/src/db/models/base.py
@@ -0,0 +1,5 @@
+"""Base."""
+from sqlalchemy.orm import declarative_base
+
+
+Base = declarative_base()
diff --git a/src/db/models/user.py b/src/db/models/user.py
new file mode 100644
index 0000000..c658020
--- /dev/null
+++ b/src/db/models/user.py
@@ -0,0 +1,50 @@
+import uuid
+
+import bcrypt
+from sqlalchemy import Column, ForeignKey, String, func
+from sqlalchemy.orm import relationship, validates
+from sqlalchemy.sql.expression import select
+from sqlalchemy.sql.sqltypes import UUID, BigInteger, Enum, DateTime
+
+from helpers.admin.enums import AccessLevel
+from .base import Base
+from ..types.fields import Password
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(BigInteger, primary_key=True, index=True, unique=True, nullable=False)
+    username = Column(String(50), nullable=False, unique=True)
+    password = Column(Password(length=156), nullable=False)
+    access_level = Column(Enum(AccessLevel))
+
+    sessions = relationship("UserSession", back_populates="user")
+
+    @validates("password")
+    def _validate_password(self, key, password):
+        return getattr(type(self), key).type.validator(password)
+
+    def verify_password(self, password):
+        return bcrypt.checkpw(password.encode(), self.password.hash.encode())
+
+
+class UserSession(Base):
+    __tablename__ = "user_sessions"
+
+    token = Column(
+        UUID(as_uuid=True),
+        default=uuid.uuid4,
+        nullable=False,
+        index=True,
+        primary_key=True,
+    )
+    user_id = Column(BigInteger, ForeignKey("users.id"), index=True, nullable=False)
+
+    user = relationship("User", back_populates="sessions")
+    created_at = Column(DateTime, default=func.now(), nullable=False)
+
+    @classmethod
+    def _filter_session_by_user_id(cls, user_id: int):
+        query = select(cls).where(cls.user_id == user_id)
+        return query
diff --git a/src/db/providers.py b/src/db/providers.py
new file mode 100644
index 0000000..13bfade
--- /dev/null
+++ b/src/db/providers.py
@@ -0,0 +1,34 @@
+from collections.abc import AsyncGenerator
+from contextlib import asynccontextmanager
+
+from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
+from sqlalchemy.sql.expression import text
+
+from helpers.logging import logger
+
+
+class DataAsyncProvider:
+    def __init__(self, db_url: str):
+        self.url = db_url
+        self.engine = create_async_engine(self.url, echo=False, future=True)
+        self.async_session_factory = async_sessionmaker(
+            self.engine, class_=AsyncSession, expire_on_commit=False
+        )
+
+    async def get_async_session(self) -> AsyncGenerator[AsyncSession, None]:
+        async with self.async_session_factory() as session:
+            yield session
+
+    @asynccontextmanager
+    async def async_session_manager(self) -> AsyncGenerator[AsyncSession, None]:
+        async with self.async_session_factory() as session:
+            yield session
+
+    async def is_connected(self) -> bool:
+        try:
+            async with self.async_session_manager() as session:
+                await session.execute(text("SELECT 1"))
+            return True
+        except Exception as ex:
+            logger.exception(ex)
+            return False
diff --git a/src/db/types/__init__.py b/src/db/types/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/db/types/fields.py b/src/db/types/fields.py
new file mode 100644
index 0000000..1c04184
--- /dev/null
+++ b/src/db/types/fields.py
@@ -0,0 +1,63 @@
+import json
+
+from sqlalchemy.types import TypeDecorator, Text, String
+
+from crypto.password import PasswordHash
+
+
+class JSONEncodedDict(TypeDecorator):
+
+    impl = Text
+
+    def process_bind_param(self, value, dialect):
+        if isinstance(value, dict | list | tuple):
+            return json.dumps(value, separators=(",", ":"))
+        elif isinstance(value, str):
+            json.loads(value)
+        return value
+
+    def process_result_value(self, value, dialect):
+        if value is not None:
+            value = json.loads(value)
+        return value
+
+
+class Password(TypeDecorator):
+    """Allows storing and retrieving password hashes using PasswordHash."""
+
+    impl = String
+
+    def __init__(self, rounds=12, **kwds):
+        self.rounds = rounds
+        super(Password, self).__init__(**kwds)
+
+    def process_bind_param(self, value, dialect):
+        """Ensure the value is a PasswordHash and then return its hash."""
+        if value is not None:
+            return self._convert(value).hash
+        return None
+
+    def process_result_value(self, value, dialect):
+        """Convert the hash to a PasswordHash, if it's non-NULL."""
+        if value is not None:
+            return PasswordHash(value, rounds=self.rounds)
+        return None
+
+    def validator(self, password):
+        """Provides a validator/converter for @validates usage."""
+        return self._convert(password)
+
+    def _convert(self, value):
+        """Returns a PasswordHash from the given string.
+
+        PasswordHash instances or None values will return unchanged.
+        Strings will be hashed and the resulting PasswordHash returned.
+        Any other input will result in a TypeError.
+        """
+        if isinstance(value, PasswordHash):
+            return value
+        elif isinstance(value, str):
+            return PasswordHash.new(value, self.rounds)
+        elif value is not None:
+            raise TypeError("Cannot convert {} to a PasswordHash".format(type(value)))
+        return None
diff --git a/src/helpers/__init__.py b/src/helpers/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/helpers/admin/__init__.py b/src/helpers/admin/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/helpers/admin/auth.py b/src/helpers/admin/auth.py
new file mode 100644
index 0000000..a61437d
--- /dev/null
+++ b/src/helpers/admin/auth.py
@@ -0,0 +1,60 @@
+from fastapi import Request
+from sqladmin.authentication import AuthenticationBackend
+
+from db import db_conn
+from db.models.user import UserSession
+from repositories.user_repository import UserRepository, UserSessionRepository
+from .enums import AccessLevel
+
+
+class AdminAuth(AuthenticationBackend):
+
+    async def login(self, request: Request) -> bool:
+        form = await request.form()
+        username, password = form["username"], form["password"]
+        async with db_conn.async_session_manager() as session:
+            user_rep = UserRepository(session)
+            user = await user_rep.get_by_username(username=username)
+            if user and user.verify_password(password):
+                user_session_rep = UserSessionRepository(session)
+                user_session = await user_session_rep.create(
+                    UserSession(
+                        user_id=user.id,
+                    )
+                )
+                request.session.update(
+                    {
+                        "user_id": user_session.user_id,
+                        "token": user_session.token.hex,
+                        "access_level": user.access_level.value,
+                    }
+                )
+                return True
+            return False
+
+    async def logout(self, request: Request) -> bool:
+        async with db_conn.async_session_manager() as session:
+            user_session_rep = UserSessionRepository(session)
+            await user_session_rep.delete_by_token(request.session["token"])
+            request.session.clear()
+        return True
+
+    async def authenticate(self, request: Request) -> bool:
+        token = request.session.get("token")
+        if token:
+            async with db_conn.async_session_manager() as session:
+                user_session_rep = UserSessionRepository(session)
+                session = await user_session_rep.get_session_by_token(token)
+                if session and session.user_id != request.session["user_id"]:
+                    session = None
+        else:
+            session = None
+        return bool(session)
+
+
+def check_accesses_level(
+    access_level: int | AccessLevel, user_access_level: int | AccessLevel
+):
+    if access_level > user_access_level:
+        return False
+    return True
diff --git a/src/helpers/admin/base/__init__.py b/src/helpers/admin/base/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/helpers/admin/base/views.py b/src/helpers/admin/base/views.py
new file mode 100644
index 0000000..33038a0
--- /dev/null
+++ b/src/helpers/admin/base/views.py
@@ -0,0 +1,17 @@
+from fastapi import Request
+from sqladmin import ModelView
+
+from helpers.admin.auth import check_accesses_level
+from ..enums import AccessLevel
+
+
+class CustomModelView(ModelView):
+    def is_accessible(self, request: Request) -> bool:
+        return check_accesses_level(
+            AccessLevel.support, request.session["access_level"]
+        )
+
+    def is_visible(self, request: Request) -> bool:
+        return check_accesses_level(
+            AccessLevel.support, request.session["access_level"]
+        )
diff --git a/src/helpers/admin/enums.py b/src/helpers/admin/enums.py
new file mode 100644
index 0000000..2a50cab
--- /dev/null
+++ b/src/helpers/admin/enums.py
@@ -0,0 +1,8 @@
+from enum import IntEnum
+
+
+class AccessLevel(IntEnum):
+    user = 0
+    support = 1
+    moderator = 2
+    administrator = 3
diff --git a/src/helpers/logging.py b/src/helpers/logging.py
new file mode 100644
index 0000000..7fd02b6
--- /dev/null
+++ b/src/helpers/logging.py
@@ -0,0 +1,34 @@
+import logging
+import sys
+
+from core.env import LOG_LEVEL, LOG_FORMAT
+
+
+_log_format = LOG_FORMAT
+
+
+def get_stream_handler(stream=sys.stderr) -> logging.StreamHandler:
+    stream_handler = logging.StreamHandler(stream)
+    return stream_handler
+
+
+def get_logger(
+    name: str = "",
+    level: str = "INFO",
+    business_handler: bool = False,
+    log_format: str = _log_format,
+) -> logging.Logger:
+    logger = logging.getLogger(name)
+    logger.setLevel(level)
+    handler = (
+        get_stream_handler()
+        if business_handler is False
+        else get_stream_handler(sys.stdout)
+    )
+    handler.setLevel(level)
+    handler.setFormatter(logging.Formatter(log_format))
+    logger.addHandler(handler)
+    return logger
+
+
+logger = get_logger(level=LOG_LEVEL)
diff --git a/src/repositories/__init__.py b/src/repositories/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/repositories/base_repository.py b/src/repositories/base_repository.py
new file mode 100644
index 0000000..02568fa
--- /dev/null
+++ b/src/repositories/base_repository.py
@@ -0,0 +1,163 @@
+from typing import Type, TypeVar, Generic, Optional, Any, Sequence
+
+from sqlalchemy import select, func, Row, RowMapping
+from sqlalchemy.exc import NoResultFound
+from sqlalchemy.ext.asyncio import AsyncSession
+
+
+T = TypeVar("T")
+
+
+class BaseRepository(Generic[T]):
+    """
+    Base repository providing common CRUD operations for async sessions.
+    """
+
+    def __init__(self, model: Type[T], session: AsyncSession):
+        self.model = model
+        self.session = session
+
+    async def get(
+        self,
+        pk: int = None,
+        filters: Optional[list] = None,
+        joins: Optional[list] = None,
+        left_joins: Optional[list[tuple[Any, Any]]] = None,
+        order_by=None,
+        options: Optional[list] = None,
+    ) -> Optional[T]:
+        """
+        Retrieve a single record by its ID or using optional filters, joins, ordering and loader options.
+        If 'id' is provided, it will be added as a filter.
+        """
+        filters = filters or []
+        joins = joins or []
+        left_joins = left_joins or []
+        options = options or []
+
+        if pk is not None:
+            filters.append(self.model.id == pk)
+
+        query = select(self.model).where(*filters)
+
+        for join_item in joins:
+            query = query.join(join_item)
+
+        for left_join_item in left_joins:
+            target, condition = left_join_item
+            query = query.outerjoin(target, condition)
+
+        if order_by is not None:
+            query = query.order_by(order_by)
+
+        for opt in options:
+            query = query.options(opt)
+
+        result = await self.session.execute(query.with_for_update())
+        return result.scalar_one_or_none()
+
+    async def get_all(
+        self,
+        filters: Optional[list] = None,
+        joins: Optional[list] = None,
+        left_joins: Optional[list[tuple[Any, Any]]] = None,
+        limit: int = 10,
+        offset: int = 0,
+        order_by=None,
+        options: Optional[list] = None,
+    ) -> Sequence[Row[Any] | RowMapping | Any]:
+        """
+        Retrieve all records with optional filters, joins, pagination, ordering and loader options.
+        """
+        filters = filters or []
+        joins = joins or []
+        left_joins = left_joins or []
+        options = options or []
+
+        query = select(self.model).where(*filters)
+
+        for join_item in joins:
+            query = query.join(join_item)
+
+        for left_join_item in left_joins:
+            target, condition = left_join_item
+            query = query.outerjoin(target, condition)
+
+        if order_by is not None:
+            if isinstance(order_by, list) or isinstance(order_by, tuple):
+                query = query.order_by(*order_by)
+            else:
+                query = query.order_by(order_by)
+
+        query = query.limit(limit).offset(offset)
+
+        for opt in options:
+            query = query.options(opt)
+
+        result = await self.session.execute(query)
+        return result.scalars().all()
+
+    async def create(self, instance: T) -> T:
+        """
+        Create a new record.
+        """
+        self.session.add(instance)
+        await self.session.commit()
+        await self.session.refresh(instance)
+        return instance
+
+    async def bulk_create(self, instances: list[T]) -> None:
+        self.session.add_all(instances)
+        await self.session.commit()
+
+    async def update(self, pk: int, **kwargs) -> T:
+        """
+        Update a record by ID.
+        """
+        obj = await self.get(pk)
+        if not obj:
+            raise NoResultFound(f"{self.model.__name__} with id {pk} not found")
+
+        for key, value in kwargs.items():
+            setattr(obj, key, value)
+
+        await self.session.commit()
+        await self.session.refresh(obj)
+        return obj
+
+    async def delete(self, pk: int) -> Optional[T]:
+        """
+        Delete a record by ID.
+        """
+        obj = await self.get(pk)
+        if not obj:
+            raise NoResultFound(f"{self.model.__name__} with id {pk} not found")
+
+        await self.session.delete(obj)
+        await self.session.commit()
+        return obj
+
+    async def count(
+        self,
+        filters: Optional[list] = None,
+        joins: Optional[list] = None,
+        left_joins: Optional[list[tuple[Any, Any]]] = None,
+    ) -> int:
+        """
+        Count the number of records with optional filters and joins.
+        """
+        filters = filters or []
+        joins = joins or []
+        left_joins = left_joins or []
+
+        query = select(func.count()).select_from(self.model).where(*filters)
+
+        for join_item in joins:
+            query = query.join(join_item)
+
+        for left_join_item in left_joins:
+            target, condition = left_join_item
+            query = query.outerjoin(target, condition)
+
+        result = await self.session.execute(query)
+        return result.scalar()
diff --git a/src/repositories/user_repository.py b/src/repositories/user_repository.py
new file mode 100644
index 0000000..0e8a252
--- /dev/null
+++ b/src/repositories/user_repository.py
@@ -0,0 +1,28 @@
+from pydantic import UUID4
+from sqlalchemy import delete
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from db import User, UserSession
+from repositories.base_repository import BaseRepository
+
+
+class UserRepository(BaseRepository):
+    def __init__(self, session: AsyncSession):
+        super().__init__(User, session)
+
+    async def get_by_username(self, username: str):
+        return await self.get(filters=[self.model.username == username])
+
+
+class UserSessionRepository(BaseRepository):
+    def __init__(self, session: AsyncSession):
+        super().__init__(UserSession, session)
+
+
+    async def get_session_by_token(self, token: UUID4):
+        return await self.get(filters=[self.model.token == token])
+
+    async def delete_by_token(self, token: UUID4):
+        query = delete(self.model).where(self.model.token == token)
+        await self.session.execute(query)
+        await self.session.commit()
diff --git a/src/requirements.txt b/src/requirements.txt
new file mode 100644
index 0000000..da5dcff
--- /dev/null
+++ b/src/requirements.txt
@@ -0,0 +1,10 @@
+fastapi
+asyncpg
+uvicorn[standard]
+sqlalchemy
+psycopg2-binary
+pydantic_settings
+alembic
+itsdangerous
+sqladmin
+bcrypt
\ No newline at end of file