公众号和小程序如何获取UnionID？

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公众号和小程序如何获取UnionID？How to obtain UnionID for official accounts and mini programs?

https://sh.api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+ appid + "&secret=" + secret;

https://api.weixin.qq.com/cgi-bin/user/info?access_token="+token+"&openid="+fromusername+"&lang=zh_CN"

The official account is related to the official account number. When users are concerned about the official account, the background will get users' event, openid and other information. use https://sh.api.weixin.qq.com/cgi-bin/token?grant_ type=client_ Credential & appid = "+ appid +" & Secret = "+ secret; get accesstoken and use https://api.weixin.qq.com/cgi-bin/user/info?access_token= "+ token +" & openid = "+ fromusername +" & lang = zh_cn "get the user information, but there is no return value of unionid in the user information. Would you like to ask everyone, if you want to get unionId, you must bind the applet and public number to the same official account of WeChat open platform? Can small programs and official account be linked? Or my access_ Incorrect token acquisition

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