Get card inventory brands

Example response

{
  "data": {
    "brands": [
      {
        "key": "amazon",
        "provider": "tangocard",
        "name": "Amazon",
        "description": "Amazon gift cards",
        "image_urls": {
          "logo": "https://example.com/amazon-logo.png"
        },
        "items": [
          {
            "key": "amazon_usd_50",
            "reward_name": "Amazon $50 Gift Card",
            "reward_type": "gift_card",
            "redemption_instructions": "Digital delivery via email",
            "credential_types": [
              "email"
            ],
            "countries": [
              "US"
            ],
            "is_active": true,
            "tiers": [
              {
                "currency_value": "50000",
                "currency_factor": "1000",
                "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
                "original_value": "50.00",
                "original_currency": "USD"
              }
            ]
          }
        ]
      }
    ]
  }
}