class Devise::RegistrationsController

def set_flash_message_for_update(resource, prev_unconfirmed_email)
  return unless is_flashing_format?
  flash_key = if update_needs_confirmation?(resource, prev_unconfirmed_email)
                :update_needs_confirmation
              elsif sign_in_after_change_password?
                :updated
              else
                :updated_but_not_signed_in
              end
  set_flash_message :notice, flash_key
end