curl --request GET \
  --url https://api.gospott.com/custom-attributes/client-contact/definitions \
  --header 'x-api-key: <api-key>'

{
  "items": [
    {
      "definition": {
        "viewType": "customText"
      },
      "id": "<string>",
      "label": "<string>",
      "viewType": "<string>",
      "createdAt": "2023-11-07T05:31:56Z",
      "modifiedAt": "2023-11-07T05:31:56Z"
    }
  ],
  "pagination": {
    "totalItems": 123,
    "page": 123,
    "hasNextPage": true
  }
}