curl --request GET \
  --url https://api.joinslash.com/card-group \
  --header 'X-API-Key: <api-key>'

{
  "items": [
    {
      "id": "<string>",
      "name": "<string>",
      "virtualAccountId": "<string>",
      "spendingConstraint": {
        "merchantCategoryRule": {
          "merchantCategories": [
            "<string>"
          ],
          "restriction": "allowlist"
        },
        "merchantRule": {
          "merchants": [
            "<string>"
          ],
          "restriction": "allowlist"
        },
        "spendingRule": {
          "utilizationLimit": {
            "limitAmount": {
              "amountCents": 123
            },
            "preset": "daily",
            "timezone": "<string>",
            "startDate": "<string>"
          },
          "utilizationLimitV2": [
            {
              "limitAmount": {
                "amountCents": 123
              },
              "preset": "daily",
              "timezone": "<string>",
              "startDate": "<string>"
            }
          ],
          "transactionSizeLimit": {
            "minimum": {
              "amountCents": 123
            },
            "maximum": {
              "amountCents": 123
            }
          }
        },
        "countryRule": {
          "countries": [
            "<string>"
          ],
          "restriction": "allowlist"
        },
        "merchantCategoryCodeRule": {
          "merchantCategoryCodes": [
            "<string>"
          ],
          "restriction": "allowlist"
        }
      }
    }
  ],
  "metadata": {
    "nextCursor": "<string>",
    "count": 123
  }
}