ch 8.5 cleanup
ch 9.1.2, settings page, correctly handle bad update of info
9.1.3 successfully edit profile
ch 9.2.2 add checks for correct user and signed in for edit and update actions
ch 9.2.3 user auth complete
ch 9.1.3 users index page without pagination
ch 9.4.2 admin class created, delete actioni implemented
ex 9.6 add spec test for no admin, add notification for guard
ch 9.6 exercises; Finish user edit, update, index, and destroy actions