Drag the edges to resize the window.

Code Editor
Terminal
Web Browser
Learn

Many web apps let users sign up for a new account and log in and out of their accounts. Together, signing up, logging in and logging out make up an authentication system.

Let's create an authentication system for a photosharing website built with Ruby on Rails.

If you're new to Rails, we recommend you do this course first.

Report a Bug
If you see a bug or any other issue with this page, please report it here.