New Rails authentication king?

In this video, we take a whirlwind tour of the authentication-zero gem (https://github.com/lazaronixon/authentication-zero). 

This new take on authentication in Rails builds upon the has_secure_password functionality and generates all the code for you, right inside your app. So you can customise all of your auth logic to your heart's content!

This is going to replace Devise as my new default auth gem!