使用的是美国节点的应用，在本地调试云函数时出错，开始没有输入登录用户的objectId是正常的，在输入登录用户信息后点击无反应，然后看了一下浏览器，报错了
Failed to load resource: Request header field Content-Length is not allowed by Access-Control-Allow-Headers.
XMLHttpRequest cannot load https://us-api.leancloud.cn/1.1/users/***objectId***?redirectByAPI=cn. Request header field Content-Length is not allowed by Access-Control-Allow-Headers.