Finish 9.1.3, Successful edits, all green. Nest -- Authorization
Finish 9.2.1, Requiring signed-in users, all green.  Next --9.2.2
Finish, 9.2.2 Requiring the right user. Next -- 9.2.3
Finish 9.2.3, Friendly Forwarding, all green.  Next, 9.3
Finish 9.3, Showing all users. Next --9.3.2
Finish 9.3.2, Sample users. --Next 9.3.3
Finish 9.3.3, Pagination, all green. Next -- 9.3.4
Finish 9.3.4, Partial refactoring, all green.  Next --Deleting users
Finish 9.4.1, Administrative users, all green.  Next --9.4.2
Finish 9.4.2, The destroy action, all green. --Next 9.5
Edit users_controller -- destroy action error fixed