ruby on rails - Devise CustomFailure and mount in routes, bad redirect -

i'm using customfailure class shown in doc (here) redirect our sign in page when unauthenticated:

class customfailure < devise::failureapp   include localization    def redirect_url     url_for(controller: "/public/sessions", action: :new, locale: locale_to_params(i18n.locale))   end    # need override respond eliminate recall   def respond     if http_auth?       http_auth     else       redirect     end   end end 

so redirects http://www.acmecorp.com/en/signin, sidekiq panel in routes.rb:

  authenticate :user, lambda { |u| u.super_admin? }     require "sidekiq/web"     mount sidekiq::web => "/sidekiq"   end 

i redirected http://www.acmecorp.com/sidekiq/en/signin instead of http://www.acmecorp.com/en/signin. reason why redirect not rid of /sidekiq part?

thanks!