Arvados

Steps to reproduce: follow the SSO installation documentation at 434be0f. Configure local accounts, and create one using the Rails console. After you finish setting up, try to log in with your created account. You'll get a 500 response, with this error in the logs:

Started GET "/" for 127.0.0.1 at 2015-08-03 17:56:41 +0000
Processing by AuthController#welcome as HTML
  Rendered auth/welcome.html.erb within layouts/application (0.7ms)
  Rendered application/_links.html.erb (41.6ms)
Completed 500 Internal Server Error in 48ms

ActionView::Template::Error (undefined method `edit_user_registration_path' for #<#<Class:0x000000035533d8>:0x00000003551308>):
    2: <%- if current_user %>
    3:   <%= link_to "Sign out", :destroy_user_session, class: "btn btn-default btn-links", role: "button" %>
    4:   <%- if controller_name != 'registrations' %>
    5:     <%= link_to "Update account", :edit_user_registration, class: "btn btn-default btn-links", role: "button" %>
    6:   <% end %>
    7: <% end -%>
    8:
  app/views/application/_links.html.erb:5:in `_app_views_application__links_html_erb___1746417297839545953_36443320'
  app/views/layouts/application.html.erb:34:in `_app_views_layouts_application_html_erb___2853150743743458663_37356600'