Update app/db.py

app/db.py

@@ -4,6 +4,8 @@ from fastapi import Depends
 from fastapi_users.db import SQLAlchemyBaseUserTableUUID, SQLAlchemyUserDatabase
 from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
 from sqlalchemy.orm import DeclarativeBase
+from sqlalchemy.orm import sessionmaker
+
 
 from sqlalchemy import URL