https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/redpacketcover/redpacketcover.getAuthenticationUrl.html

红包封面，用接口鉴权的方式发放，服务端调用API提示，没有接口权限，返回值：

{

"errcode": 48001,

"errmsg": "api unauthorized rid: 61d5349f-03ccd2d9-33a0bdcc"

}