update security handling for user namespace

app/helpers/devise_helper.rb

@@ -0,0 +1,7 @@
+module DeviseHelper
+  def devise_error_messages!
+    if resource.errors.present?
+      content_tag(:div, content_tag(:h2, t("errors.messages.not_saved.#{resource.errors.size == 1 ? 'one' : 'other'}", count: resource.errors.size)) +content_tag(:ul, resource.errors.full_messages.map{|m| content_tag(:li, m)}.join.html_safe), class: 'alert alert-error')
+    end
+  end
+end