curl --request GET \
  --url https://api.loyaltylion.com/v2/customers/{merchant_id}/available_rewards \
  --header 'Authorization: Bearer <token>'

{
  "rewards": [
    {
      "id": 123,
      "title": "<string>",
      "description": "<string>",
      "sort_key": 123,
      "content": {},
      "point_cost": 123,
      "method": "voucher",
      "discount_type": "flat",
      "discount_amount": 123,
      "minimum_spend": 123,
      "usage_limit": 123,
      "min_redemption_amount": 1,
      "max_redemption_amount": 1,
      "max_free_shipping": null,
      "site_id": 123,
      "target_site": {
        "id": 123,
        "name": "<string>",
        "url": "<string>"
      },
      "order_type": "subscription",
      "target_type": "all",
      "target_collections": [
        {
          "id": 123,
          "url": "<string>",
          "restriction_text": "<string>"
        }
      ],
      "target_products": [
        {
          "id": 123,
          "variant_id": 123,
          "sku": "<string>",
          "url": "<string>",
          "image_url": "<string>",
          "title": "<string>",
          "sort_key": 123
        }
      ],
      "session_options": null,
      "auto_refund_seconds": null,
      "expiry_options": {
        "kind": "does_not_expire",
        "seconds": null
      },
      "redeemable_expiry_options": null,
      "supported_channels": [
        "web"
      ],
      "kind": "active_subscription_discount_voucher",
      "recurring_cycle_limit": 123
    }
  ]
}