{ "userid": "zhangsan" }
curl --location -g --request POST 'http://127.0.0.1/cgi-bin/user/convert_to_openid?access_token={{accesstoken}}' \ --header 'Content-Type: application/json' \ --data-raw '{ "userid": "zhangsan" }'
{ "errcode": 0, "openid": "string", "errmsg": "string" }