How to implementing ngrok with browser-sync

BrowserSync and Ngrok

const browserSync = require('browser-sync'); // @link https://www.npmjs.com/package/browser-sync
const ngrok = require('ngrok'); // @link https://www.npmjs.com/package/ngrok

// Create BrowserSync instance
const instance = browserSync.create("Whatever-Name-You-Want");

// BrowserSYnc Options
// @link https://browsersync.io/docs/options
const options = {...}

// Implementing ngrok
instance.init(options, (err, bs) => {
  ngrok.connect(bs.options.get('port')).then(ngrokUrl => {
    console.log("Ngrok URL", ":", ngrokUrl);
  })
  return true
})