curl --request GET \
  --url https://upay-sistema-api.onrender.com/api/v1/coupons \
  --header 'X-API-Key: <api-key>'

{
  "message": "<string>",
  "coupons": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "code": "<string>",
      "discountType": "PERCENTAGE",
      "discountValue": 123,
      "description": "<string>",
      "minPurchaseCents": 123,
      "maxDiscountCents": 123,
      "usageLimit": 123,
      "perUserLimit": 123,
      "validFrom": "2023-11-07T05:31:56Z",
      "validUntil": "2023-11-07T05:31:56Z",
      "status": "<string>",
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ],
  "pagination": {
    "page": 123,
    "limit": 123,
    "total": 123,
    "totalPages": 123
  }
}