fix to add starlette error handler import

src/main.py

@@ -15,6 +15,7 @@ from slowapi import _rate_limit_exceeded_handler
 from slowapi.errors import RateLimitExceeded
 from sqlalchemy import inspect
 from sqlalchemy.exc import SQLAlchemyError
+from starlette.exceptions import StarletteHTTPException
 from sqlalchemy.orm import scoped_session
 from sqlalchemy.ext.asyncio import async_scoped_session
 from starlette.middleware.base import BaseHTTPMiddleware, RequestResponseEndpoint