https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=ACCESS_TOKEN 这个接口，发送文本消息，

返回结果 {"errcode":0,"errmsg":"ok","invaliduser":"charles","msgid":"3yzdAQ63LCLTa8NCVqmn2QbNKB6_2lO6YxFcrlJ_neAcTvIlWWyKnruFHVpH8p-1qmdymj2FWPDtqTeQHxNYTg"}