查询门店的WiFi信息
        http://mp.weixin.qq.com/wiki/15/bcfb5d4578ea818b89913472cf2bbf8f.html

        :param shop_id: 门店 ID
        :return: 返回的 JSON 数据包

def get_shop(self, shop_id=0):
        """
        查询门店的WiFi信息
        http://mp.weixin.qq.com/wiki/15/bcfb5d4578ea818b89913472cf2bbf8f.html

        :param shop_id: 门店 ID
        :return: 返回的 JSON 数据包
        """
        res = self._post(
            'shop/get',
            data={
                'shop_id': shop_id,
            },
            result_processor=lambda x: x['data']
        )
        return res