Update main.py

main.py

@@ -13,7 +13,7 @@ import os
 import time
 import asyncio
 from typing import List, Optional, Dict
-from fastapi import FastAPI, UploadFile, File, HTTPException, Depends, BackgroundTasks
+from fastapi import FastAPI, UploadFile, File, HTTPException, Depends, BackgroundTasks,Header
 from fastapi.middleware.cors import CORSMiddleware
 from pydantic import BaseModel
 from threading import Lock