title: Sidekiq authentication default action (device)
body: <p>when using authentication on sidekiq monitor</p>
  
  <pre><code>authenticate :admin do
    mount Sidekiq::Web =&gt; '/admin/sidekiq'
  end
  </code></pre>
  
  <p>the default action after auth fail is to redirect to the admin login path (using device), is it possible to change that action to use render_404 for example?</p>