import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: 'My API Key',
});

const notificationChannels = await client.notificationChannels.list();

console.log(notificationChannels.data);

{
  "data": [
    {
      "id": "12455643-3cf1-4683-ad23-1cd32f7d5e0a",
      "notification_profile_id": "12455643-3cf1-4683-ad23-1cd32f7d5e0a",
      "channel_type_id": "sms",
      "channel_destination": "+13125550000",
      "created_at": "2019-10-15T10:07:15.527Z",
      "updated_at": "2019-10-15T10:07:15.527Z"
    }
  ],
  "meta": {
    "page_number": 2,
    "page_size": 25,
    "total_pages": 3,
    "total_results": 55
  }
}