curl --request GET \
  --url https://api.cloud.flexprice.io/v1/coupons \
  --header 'x-api-key: <api-key>'

{
  "items": [
    {
      "amount_off": 123,
      "cadence": "once",
      "created_at": "<string>",
      "created_by": "<string>",
      "currency": "<string>",
      "duration_in_periods": 123,
      "environment_id": "<string>",
      "id": "<string>",
      "max_redemptions": 123,
      "metadata": {},
      "name": "<string>",
      "percentage_off": 123,
      "redeem_after": "<string>",
      "redeem_before": "<string>",
      "rules": {},
      "status": "published",
      "tenant_id": "<string>",
      "total_redemptions": 123,
      "type": "fixed",
      "updated_at": "<string>",
      "updated_by": "<string>"
    }
  ],
  "pagination": {
    "limit": 123,
    "offset": 123,
    "total": 123
  }
}