获取二维码

成功返回：
 {
    "code": 0,
    "message": "success",
    "data": {
        "scene": "pcLogin21122418055065788",
        "qrcode_url": "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=gQHN8DwAAAAAAAAAAS5odHRwOi8vd2VpeGluLnFxLmNvbS9xLzAyamNjMmR3YUdjTkYxWC1mOWh4YzIAAgR_m8VhAwSA9AMA",
        "create_time": "2021-12-24 18:05:50"
    }
}