telegram-bot-for-manipulate-orders/app/database/database_engine.py

import os
from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine

DATABASE_URL = (f"postgresql+asyncpg://{os.getenv('DB_USER')}:{os.getenv('DB_PASSWORD')}@"
                f"{os.getenv('DB_HOST')}/{os.getenv('DATABASE')}")

engine = create_async_engine(DATABASE_URL, echo=True)
async_session_ = async_sessionmaker(bind=engine, expire_on_commit=False)