$ tree api api ├── database.py ├── hash.py ├── main.py ├── models.py ├── oauth2.py └── schemas.py from sqlalchemy import create_engine from sqlalchemy.orm import sessionmaker, declarative_base DB_URL = "sqlite:///app.db" engine = create_engine(DB_URL, connect_args={"check_same_thread": False}) SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine) def get_db(): db = SessionLoc