curl --request GET \
  --url https://{cluster}.voucherify.io/v1/loyalties/{campaignId}/rewards \
  --header 'Authorization: Bearer <token>' \
  --header 'X-App-Id: <api-key>' \
  --header 'X-App-Token: <api-key>'

{
  "object": "list",
  "data_ref": "data",
  "data": [
    {
      "id": "rewa_6VSWcXjfm5PuZlfeuZxl5JZT",
      "reward_id": "rew_pjJKIZgjIopIPZyibEAt7oPk",
      "related_object_id": "camp_7s3uXI44aKfIk5IhmeOPr6ic",
      "related_object_type": "campaign",
      "created_at": "2022-08-30T08:24:32.171Z",
      "updated_at": null,
      "object": "reward_assignment"
    },
    {
      "id": "rewa_7gFZsNg8oiry63FtzML0N52R",
      "reward_id": "rew_BUfchmIo7pOR8GrZMw0vVL08",
      "related_object_id": "camp_7s3uXI44aKfIk5IhmeOPr6ic",
      "related_object_type": "campaign",
      "parameters": {
        "loyalty": {
          "points": 3000000
        }
      },
      "created_at": "2022-05-13T11:14:58.146Z",
      "updated_at": null,
      "object": "reward_assignment"
    },
    {
      "id": "rewa_eAGhQSY4FS4T3q4zMkiarHoN",
      "reward_id": "rew_nIy4gHpQHle2c3pNMwuj7G6j",
      "related_object_id": "camp_7s3uXI44aKfIk5IhmeOPr6ic",
      "related_object_type": "campaign",
      "parameters": {
        "loyalty": {
          "points": 100
        }
      },
      "created_at": "2022-02-28T11:56:55.241Z",
      "updated_at": null,
      "object": "reward_assignment"
    }
  ],
  "total": 3
}