import Telnyx from 'telnyx';

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

await client.whatsapp.phoneNumbers.delete('phone_number');

{
  "errors": [
    {
      "code": "<string>",
      "title": "<string>",
      "detail": "<string>",
      "source": {
        "pointer": "<string>",
        "parameter": "<string>"
      },
      "meta": {}
    }
  ]
}