As one of the contributors to Microauth[1] I have to say file-based auth using a dedicated auth server behind the scenes.<p>1. <a href="https:&#x2F;&#x2F;github.com&#x2F;LukeB42&#x2F;Microauth" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;LukeB42&#x2F;Microauth</a>