rails generate starter:resource User username:string password_digest:string
Uncommented bcrypt gem and bundle installed.
Added secure password logic to User. Ensured uniqueness of username.
Updated new user form to receive password and password confirmation. Updated Users#create accordingly.
Added routes for session.
Added actions for session.
Added a sign in form.
Added sign-in logic.
Added sign-out logic.
Enhanced application layout with nav bar and sign-in/out links.