curl --request GET \
  --url https://api.halth.com/v1/organisations/{organisationId}/appointment-types

{
  "items": [
    {
      "id": "<string>",
      "name": "<string>",
      "durationMinutes": 123,
      "price": 123,
      "providers": [
        "<string>"
      ],
      "locations": [
        "<string>"
      ],
      "createdAt": "<string>",
      "deleted": true,
      "maxAttendees": 123,
      "description": "<string>",
      "category": "<string>",
      "billableItems": [
        {
          "name": "<string>",
          "basePrice": 123,
          "totalPrice": 123,
          "taxAmount": 123,
          "taxRate": 123,
          "id": "<string>",
          "itemCode": "<string>",
          "serviceItem": {
            "id": "<string>",
            "itemCode": "<string>",
            "category": "<string>",
            "description": "<string>"
          },
          "pmsBillableItemId": "<string>"
        }
      ]
    }
  ],
  "page": 1,
  "limit": 10,
  "totalItems": 100,
  "totalPages": 10
}