fix: convert json in string

main.py

@@ -214,7 +214,7 @@ async def create_upload_file(file: UploadFile):
     return {"filename": file.filename}
 
 @api_app.websocket("/ws/{room_id}/{user_id}")
-async def websocket_endpoint(websocket: WebSocket,  room_id: str, user_id: int):
+async def websocket_endpoint(websocket: WebSocket,  room_id: str):
     global QA
 
     await socket_manager.add_user_to_room(room_id, websocket)