卡券功能，创建优惠券的领券二维码接口

https://api.weixin.qq.com/card/qrcode/create?access_token=TOKEN

单张券可以通过设置is_unique_code参数限制只能领取一次

{
    "action_name": "QR_CARD",
    "expire_seconds": 1800,
    "action_info": {
    "card": {
    "card_id": "pFS7Fjg8kV1IdDz01r4SQwMkuCKc",
    "is_unique_code": true ,
    "outer_str":"12b"
  }
 }
}

但是如果是多张券，按下面方式设置将不能限制只能领取一次，应该如何实现？

{
    "action_name": "QR_MULTIPLE_CARD",
    "action_info": {
    "multiple_card": {
    "card_list": [
 {
     "card_id": "p1Pj9jgj3BcomSgtuW8B1wl-wo88",
     "is_unique_code": true ,
     "outer_str":"12b"
},
 {
    "card_id": "p1Pj9jgj3BcomSgtuW8B1wl-wo98",
    "is_unique_code": true ,
    "outer_str":"12b"
}
]
}
}
}