twilio_test.js

const { VoipList } = require('twilio/lib/rest/api/v2010/account/availablePhoneNumber/voip');

var express = require('express');

require('dotenv').config()

const accountSid = process.env.TWILIO_ACCOUNT_SID;
const authToken = process.env.TWILIO_AUTH_TOKEN;
const twilio_callback_url = process.env.TWILIO_CALLBACK_URL;
const twilio_from = process.env.TWILIO_FROM
const twilio_to = process.env.TWILIO_TO

const twilio = require('twilio')
const twilio_client = twilio(accountSid, authToken);

async function voice_call() {
    ret = await twilio_client.calls
        .create({
            url: twilio_callback_url,
            to: twilio_to,
            from: twilio_from
        })
    console.log(ret.sid)
    //   .then(call => console.log(call.sid));
}

var app = express();
app.use(express.urlencoded());
app.listen(8081)

// Create a route to respond to a call
app.post('/respondToVoiceCall', function(req, res) {
    //Validate that this request really came from Twilio...
    if (twilio.validateExpressRequest(req, authToken)) {
        const twiml = new twilio.twiml.VoiceResponse();
        twiml.say('Hello World');
        twiml.play('http://demo.twilio.com/docs/classic.mp3');
        twiml.hangup();
        res.type('text/xml');
        res.send(twiml.toString());
    }
    else {
        res.send('you are not twilio.  Buzz off.');
    }
});

(async () => {
    await voice_call()
})();