Congratulations! You built a authorization system from scratch.

1. The role column in the User model specifies a users' role
2. A method like def admin? and def editor? is created for business logic
3. The require_editor and require_admin methods redirect to () if the current user is not an editor or admin.
4. The before action acts a filter, calling require_editor or require_admin before excuting controller actions.
5. The current_user method can be used in the views to display links based on the signed in user's role.