Ah, sorry. I don't have much experience with RoR. Laravel, mostly, and Laravel auth is one command away. I assume RoR won't be too far away from that, too.
well, whenever I did rails, that was pretty standard. Laravel's baked in auth, is probably why it's so much better than rails, that and queues, telescope, etc... all the nice to haves that come standard in laravel that are extra in rails apps.