Obter Cupom

curl --request GET \
  --url https://api.mginex.com/open-api/catalog/coupon/{couponId} \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "code": "<string>",
    "enabled": true,
    "discount": {
      "type": "FIXED",
      "amount": 123
    },
    "expirationDate": "2023-11-07T05:31:56Z",
    "maxUses": 123,
    "usesCount": 123
  }
}