import Telnyx from 'telnyx';

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

const response = await client.textToSpeech.listVoices();

console.log(response.voices);

{
  "voices": [
    {
      "id": "<string>",
      "name": "<string>",
      "provider": "<string>",
      "label": "<string>",
      "accent": "<string>",
      "gender": "<string>",
      "age": "<string>",
      "language": "<string>"
    }
  ]
}