Close, but Taiko has a flat API. For reference here's a script in puppeteer

  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://example.com');
  await page.screenshot({path: 'example.png'});

  await browser.close();

and the same thing in Taiko

  await openBrowser()
  await goto('https://example.com');
  await screenshot({path: 'example.png'});
  await closeBrowser();