fix

app/db.py

@@ -2,9 +2,8 @@ from typing import AsyncGenerator
 
 from fastapi import Depends
 from fastapi_users.db import SQLAlchemyBaseUserTableUUID, SQLAlchemyUserDatabase
-from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
-from sqlalchemy.ext.declarative import DeclarativeMeta, declarative_base
-from sqlalchemy.orm import sessionmaker
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+from sqlalchemy.orm import DeclarativeBase
 from dotenv import load_dotenv
 import os
 
@@ -24,15 +23,18 @@ else:
 db_connection_string = os.getenv("DB_CONNECTION_STRING")
 
 DATABASE_URL = db_connection_string
-Base: DeclarativeMeta = declarative_base()
 
-    
+
+class Base(DeclarativeBase):
+    pass
+
+
 class User(SQLAlchemyBaseUserTableUUID, Base):
     pass
 
 
 engine = create_async_engine(DATABASE_URL)
-async_session_maker = sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+async_session_maker = async_sessionmaker(engine, expire_on_commit=False)
 
 
 async def create_db_and_tables():