old_contents: from django.conf.urls import url
  from . import views
  
  
  urlpatterns = [
      url(r'^$', views.UserList.as_view(), name='user-list'),
      url(r'^(?P<user_id>\w+)/$', views.UserDetail.as_view(), name='user-detail'),
      url(r'^(?P<user_id>\w+)/nodes/$', views.UserNodes.as_view(), name='user-nodes'),
  ]
  
new_contents: from django.conf.urls import url
  from . import views
  
  
  urlpatterns = [
      url(r'^$', views.UserList.as_view(), name='user-list'),
      url(r'^(?P<user_id>\w+)/$', views.UserDetail.as_view(), name='user-detail'),
      url(r'^(?P<user_id>\w+)/nodes/$', views.UserNodes.as_view(), name='user-nodes'),
      url(r'^(?P<user_id>\w+)/registrations/$', views.UserRegistrations.as_view(), name='user-registrations')
  ]
  
subject: Add /users/me/registrations/ URL