Make a call to the available phone numbers Twilio API

index.js

var twilio = require('twilio');

const accountSid = process.env.TWILIO_AC_SID;
const authToken = process.env.TWILIO_AUTH_TOKEN;
var client = require('twilio')(accountSid, authToken);

// Make a call to the available phone numbers API for the US
var twilioPromise = client.availablePhoneNumbers('US').local.list({
  areaCode: '650'
});

twilioPromise.then(data => {
  console.log(data);
});