https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/access-token/auth.getAccessToken.html

服务器通过api.weixin.qq.com/cgi-bin/token接口获得access_token,返回正常，但是用这个token去发送订阅消息，提示acess_token无效！
1、获取access_token返回的结果：
{"access_token":"45_9Qpy1Z5AC9CU7m3tAxfG5_20uXNf56m2uZWTI4Tns3r_njtwnufPMqHJ-8sBpha-3T-tvl4DzkUjixfpWSiJiSM8HK5Mh-WxtE9AxJzLFobvL7xYQ5HNb8MF9Kl5f-pVyoC6Nbz4gAuw1SHF
CcACAUSP","expires_in":7200}
2、用返回的access_token发送订阅消息的结果：
{"errcode":40001,"errmsg":"invalid credential, access_token is invalid or not latest rid: 60a365d9-7a8f91e6-2ab91831"}