咨询wx.request问题

https://developers.weixin.qq.com/miniprogram/dev/api/network/request/wx.request.html

为什么在云函数入口块里面使用request会报错无法识别wx.呢?麻烦帮看一下,谢谢

errCode: -404011 cloud function execution error | errMsg: cloud.callFunction:fail requestID e6cfc5a3-85dd-11ea-9942-525400a6bef5, cloud function service error code -504002, error message wx is not defined

ReferenceError: wx is not defined