import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});

const notificationSetting = await client.notificationSettings.create();

console.log(notificationSetting.data);

{
  "data": {
    "id": "8eb5b5f9-5893-423c-9f15-b487713d44d4",
    "notification_event_condition_id": "70c7c5cb-dce2-4124-accb-870d39dbe852",
    "notification_profile_id": "12455643-3cf1-4683-ad23-1cd32f7d5e0a",
    "associated_record_type": "phone_number",
    "associated_record_type_value": "+13125550000",
    "status": "enable-received",
    "notification_channel_id": "12455643-3cf1-4683-ad23-1cd32f7d5e0a",
    "parameters": [
      {
        "name": "phone_number",
        "value": "+13125550000"
      }
    ],
    "created_at": "2019-10-15T10:07:15.527Z",
    "updated_at": "2019-10-15T10:07:15.527Z"
  }
}