Update api.py

api.py

@@ -13,7 +13,7 @@ import subprocess
 from fastapi import BackgroundTasks
 import time
 from bilibili_api import sync, video_uploader, Credential#bili上传部分
-import concurrent.futures #线程保证后台任务的先后
+import asyncio #保证后台任务的先后
 
 
 sessdata = os.getenv('sessdata')