app/views/devise/fido_usf_registrations/show.html.erb
<h2>FIDO U2F Devices</h2>
<p>List of registered devices:</p>
<%= render 'devise/fido_usf_registrations/devices' %>
<p><%= link_to 'Back', root_path %></p>
<p><%= link_to 'Add', send("new_#{resource_name}_fido_usf_registration_path") %></p>