def reject_insert(self, s_pappid, order_id, reason, redirect_url=None):
return self._post(<EOL>'<STR_LIT>',<EOL>data={<EOL>'<STR_LIT>': s_pappid,<EOL>'<STR_LIT>': order_id,<EOL>'<STR_LIT>': reason,<EOL>'<STR_LIT:url>': redirect_url,<EOL>},<EOL>)<EOL>
拒绝用户的开发票请求
详情请参考
https://mp.weixin.qq.com/wiki?id=mp1497082828_r1cI2

:param s_pappid: 开票平台在微信的标识号，商户需要找开票平台提供
:param order_id: 订单id，在商户内单笔开票请求的唯一识别号
:param reason: 拒绝原因
:param redirect_url: 跳转链接