curl --request GET \
  --url https://api.thehaystack.ai/v2/haystack/collections \
  --header 'Authorization: Bearer <token>'

{
  "collections": [
    {
      "id": 1,
      "name": "Sunday Sermons",
      "fullService": false,
      "variantTypes": [
        {
          "id": 123,
          "name": "Sermon Video",
          "indexable": true,
          "displayOrder": 123,
          "collectionId": 123
        }
      ]
    }
  ],
  "limit": 123,
  "offset": 123,
  "page": 123,
  "totalRecords": 123,
  "totalPages": 123,
  "hasMore": true
}