你好，我调用https://api.weixin.qq.com/sns/jscode2session换取 session_key一直报错，报错是{"errcode":40029,"errmsg":"invalid code, rid: 62f30e1c-63af1f99-4f0861cb"}。
code调用wx.login返回的，appid小程序和后台调用用的都是一样的。
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code被消费过了吧
参数放到url上，不是body里。
https://developers.weixin.qq.com/miniprogram/dev/OpenApiDoc/user-login/code2Session.html
GET https://api.weixin.qq.com/sns/jscode2session?appid=APPID&secret=SECRET&js_code=JSCODE&grant_type=authorization_codecode 值 一次性的 。换个再试下~