Lighthouse score with BBC Signin

.babelrc

{
  "presets": ["@babel/preset-env"]
}

bbc-signin-lighthouse.js

import { getSignedInPage } from '@bbc/signin';
import lighthouse from 'lighthouse';
import { URL } from 'url';
import { writeFileSync } from 'fs';

const url = 'https://www.bbc.co.uk/sounds';

(async () => {
  try {
    const puppeteer = await getSignedInPage({
      username: process.env.BBC_USERNAME,
      password: process.env.BBC_PASSWORD
    });

    const browser = puppeteer[1];

    const { lhr } = await lighthouse(url, {
      port: (new URL(browser.wsEndpoint())).port,
      output: 'html',
      logLevel: 'info'
    });

    writeFileSync('./lhr.html', JSON.stringify(lhr));

    await browser.close();
  } catch (e) {
    console.log(e);
  }
})();

package.json

{
  "name": "lighthouse-score",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "test": "BABEL_ENV=test babel-node index.js"
  },
  "keywords": ["lighthouse", "bbc", "signin"],
  "author": "Simone Spaccarotella",
  "dependencies": {
    "@bbc/signin": "^1.2.3",
    "lighthouse": "^4.0.0-alpha.2-3.2.1"
  },
  "devDependencies": {
    "@babel/core": "^7.1.6",
    "@babel/node": "^7.0.0",
    "@babel/preset-env": "^7.1.6"
  }
}