curl --request GET \
  --url https://platform.thena.ai/v1/custom-field \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "name": "<string>",
      "uid": "<string>",
      "organizationId": "<string>",
      "source": "ticket",
      "fieldType": "text",
      "subFieldType": "single_line",
      "organization": {},
      "options": [
        "<string>"
      ],
      "metadata": {},
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z",
      "isActive": true
    }
  ],
  "status": true,
  "message": "<string>",
  "timestamp": "2023-11-07T05:31:56Z"
}