curl --request GET \
  --url https://api.voucherify.io/v2/loyalties/rewards/{id}/activities \
  --header 'Authorization: Bearer <token>' \
  --header 'X-App-Id: <api-key>' \
  --header 'X-App-Token: <api-key>'

{
  "data": [
    {
      "id": "<string>",
      "data": {
        "reward": {
          "id": "<string>",
          "name": "<string>",
          "metadata": {},
          "created_at": "2023-11-07T05:31:56Z",
          "updated_at": "2023-11-07T05:31:56Z",
          "object": "<string>",
          "material": {
            "product": {
              "id": "<string>"
            },
            "sku": {
              "product_id": "<string>",
              "id": "<string>"
            }
          },
          "digital": {
            "discount_coupons": {
              "campaign_id": "<string>"
            },
            "gift_vouchers": {
              "campaign_id": "<string>",
              "balance": 1
            }
          }
        }
      },
      "created_at": "2023-11-07T05:31:56Z",
      "reward_id": "<string>",
      "group_id": "<string>",
      "source": {
        "user": {
          "id": "<string>"
        },
        "api_key": {
          "name": "<string>",
          "app_id": "<string>",
          "client_app_id": "<string>"
        }
      }
    }
  ],
  "cursor": {
    "next": "<string>",
    "expires_at": "2023-11-07T05:31:56Z"
  },
  "object": "<string>"
}