Update app.py

app.py

@@ -2,7 +2,7 @@ from fastapi import FastAPI, WebSocket
 from fastapi.responses import HTMLResponse
 import uvicorn
 import json
-from fastapi import Request, HTTPException
+from fastapi import Request, HTTPException, Header, Depends
 from pydantic import BaseModel
 from typing import List, Optional
 import uuid
@@ -361,7 +361,7 @@ async def get_proxy():
 @app.post("/v1/chat/completions", response_model=ChatCompletionResponse)
 async def chat_completions(
     request: ChatCompletionRequest,
-    authorization: str = Header(None)  # Add Authorization header
+    authorization: str | None = Header(None)  # Add Authorization header
 ):
     # Extract and validate API key
     if not authorization or not authorization.startswith("Bearer "):