DB connection clean up

app/main.py

@@ -10,8 +10,8 @@ from functools import lru_cache
 from pydantic import BaseModel, EmailStr, Field
 from typing import Dict, List, Optional, Set, Union
 
-from sqlalchemy import create_engine, text
-from sqlalchemy.exc import IntegrityError, OperationalError
+# from sqlalchemy import create_engine, text
+# from sqlalchemy.exc import IntegrityError, OperationalError
 
 from . import config
 # from app.lib_general import common_route_params, Common_Route_Params