docs: def delete_account(self, account):
          """
          删除客服账号
          详情请参考
          http://mp.weixin.qq.com/wiki/1/70a29afed17f56d537c833f89be979c9.html
  
          :param account: 完整客服账号，格式为：账号前缀@公众号微信号
          :return: 返回的 JSON 数据包
          """
          params_data = [
              'access_token={0}'.format(quote(self.access_token)),
              'kf_account={0}'.format(quote(to_binary(account), safe=b'/@')),
          ]
          params = '&'.join(params_data)
          return self._get(
              'https://api.weixin.qq.com/customservice/kfaccount/del',
              params=params
          )