I mentioned Identity in my first comment. I've never found it as simple as Devise though - especially in an API only setting. With Devise there's a third-party

I mentioned Identity in my first comment. I've never found it as simple as Devise though - especially in an API only setting. With Devise there's a third-party Gem you can use called devise_token_auth which deals with everything automatically. https://github.com/lynndylanhurley/devise_token_auth https://github.com/lynndylanhurley/devise_token_auth