fix pytest

backend/app/db/models.py

@@ -1,6 +1,5 @@
 from sqlalchemy import Boolean, Column, Integer, String, DateTime,ForeignKey,Table
-from sqlalchemy.ext.declarative import as_declarative
-from sqlalchemy.orm import relationship
+from sqlalchemy.orm import relationship,as_declarative
 from datetime import datetime
 from app.db.session import Base
 from app.core.security import chacha20Decrypt