5：获取微信公众号全局唯一接口凭证的url:https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wx5accef030a19cd6b&secret=28a03cb9604ab5116b41e7a44fbab0a6 
 ; 结果：{"access_token":"95_9htLxf2ErWJTRGt6nVpvEaBs13F7Rxt4pvqBDM2KvulG3AEffC7vezlF5uVWqD7vKZeMEzacd9Ucyc18Ht9WA4G1B9Y5lf31lW0iVdHEpUsolgXKDFspe3UTFAoOYVbAJABLI","expires_in":7200,"errcode":null,"errmsg":null}