DEPRECATION WARNING: [Devise] `DeviseHelper.devise_error_messages!`
is deprecated and it will be removed in the next major version.
To customize the errors styles please run `rails g devise:views` and
modify the `devise/shared/error_messages` partial.
We will render the resource errors instead fo calling the deprecated method.
This is necessary because rails gets confused when it has a a “root”
registration_controller and another non-root one. The non-root one uses
the views from the root.
