Update main.py

main.py

@@ -18,6 +18,7 @@ from usage_tracker import UsageTracker
 from starlette.middleware.base import BaseHTTPMiddleware
 from collections import defaultdict
 from fastapi import Security #new
+from fastapi import Depends
 from fastapi.security import APIKeyHeader
 from starlette.exceptions import HTTPException
 from starlette.status import HTTP_403_FORBIDDEN