{"errcode":48001,"errmsg":"api unauthorized, hints: [ req_id: eRQnua0577th48 ]"}

https://api.weixin.qq.com/sns/oauth2/access_token?appid=&secret=&code=071oJDzL0Ekxo72u2oBL0U9IzL0oJDzP&grant_type=authorization_code

这个函数获取OPEN_ID获取不到，提示如上：

{"errcode":48001,"errmsg":"api unauthorized, hints: [ req_id: eRQnua0577th48 ]"}