cool thing you can do here that will account for errors in the updates: 
at the top of this controller:
```ruby
respond_to :html
```
then in this action, instead of `redirect_to current_user` do this:
```ruby
respond_with current_user
```

this will check and see if the updates were valid and if so, redirect to the current_user, and if they weren't valid, it will render the edit view again.