import Telnyx from 'telnyx';

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

const voiceDesign = await client.voiceDesigns.retrieve('id');

console.log(voiceDesign.data);

{
  "data": {
    "record_type": "voice_design",
    "id": "550e8400-e29b-41d4-a716-446655440000",
    "name": "friendly-narrator",
    "version": 1,
    "text": "Hello, welcome.",
    "prompt": "Speak in a warm tone",
    "voice_sample_size": 48000,
    "version_created_at": "2024-01-01T00:00:00Z",
    "created_at": "2024-01-01T00:00:00Z",
    "updated_at": "2024-01-01T00:00:00Z"
  }
}