Update app.py

app.py

@@ -113,7 +113,7 @@ async def proxy_openai_api(request: Request):
 
     request_body = await request.json() if request.method in {'POST', 'PUT'} else None
 
-    async def stream_api_response(api_key: str) -> AsyncIterable[str]:
+    async def stream_api_response(api_key: str):
         update_authorization_header(api_key)
         try:
             streaming = client.stream(request.method, COMPLETIONS_URL, headers=headers, params=request.query_params, json=request_body)