User sign-in via Google OAuth

Continuing the discussion from Protect pages with Google OAuth?:

In the company I work for we also use Google Apps and I was wondering if it’s possible to restrict some parts of our Kirby-powered website by letting users log in with their Google Apps account.

Anyone can point me in the right direction or at least tell if it’s doable?

Thank you!

If it’s just about restricting access to parts of the site (and not the panel), that should be no problem. The old Kirby forum used Twitter authentication.