old_contents: from django.conf.urls import url, include
  from django.contrib import admin
  from registration.backends.simple.views import RegistrationView
  from django.contrib.auth import views as auth_views
  from . import views
  from rest_framework.routers import DefaultRouter
  
  router = DefaultRouter()
  router.register(r'comments', views.CommentViewSet)
  # WARNING! Enabling this might cause unauthorized dweet posting
  # router.register(r'dweets', views.DweetViewSet)
  
  urlpatterns = [
      url(r'^admin/', admin.site.urls),
  
      url(r'^accounts/register/$',
          RegistrationView.as_view(success_url='/'),
          name='register'),
      url(r'^password/change/$',
          auth_views.password_change,
          name='password_change'),
      url(r'^password/change/done/$',
          auth_views.password_change_done,
          name='password_change_done'),
      url(r'^password/reset/$',
          auth_views.password_reset,
          name='password_reset'),
      url(r'^password/reset/done/$',
          auth_views.password_reset_done,
          name='password_reset_done'),
      url(r'^password/reset/complete/$',
          auth_views.password_reset_complete,
          name='password_reset_complete'),
      url(r'^password/reset/confirm/(?P<uidb64>[0-9A-Za-z]+)-(?P<token>.+)/$',
          auth_views.password_reset_confirm,
          name='password_reset_confirm'),
      url(r'^accounts/', include('registration.backends.simple.urls')),
  
      url(r'^accounts/password/reset/confirm', auth_views.password_change),
      url(r'^u/', include('dwitter.user.urls')),
      url(r'^dweet/', include('dwitter.dweet.urls')),
      url(r'^', include('dwitter.feed.urls')),
      url(r'^api/', include(router.urls)),
  ]
  
new_contents: from django.conf.urls import url, include
  from django.contrib import admin
  from registration.backends.simple.views import RegistrationView
  from django.contrib.auth import views as auth_views
  from . import views
  from rest_framework.routers import DefaultRouter
  
  router = DefaultRouter()
  router.register(r'comments', views.CommentViewSet)
  # WARNING! Enabling this might cause unauthorized dweet posting
  # router.register(r'dweets', views.DweetViewSet)
  
  urlpatterns = [
      url(r'^admin/', admin.site.urls),
  
      url(r'^accounts/register/$',
          RegistrationView.as_view(success_url='/'),
          name='register'),
      url(r'^password/change/$',
          auth_views.password_change,
          name='password_change'),
      url(r'^password/change/done/$',
          auth_views.password_change_done,
          name='password_change_done'),
      url(r'^password/reset/$',
          auth_views.password_reset,
          name='password_reset'),
      url(r'^password/reset/done/$',
          auth_views.password_reset_done,
          name='password_reset_done'),
      url(r'^password/reset/complete/$',
          auth_views.password_reset_complete,
          name='password_reset_complete'),
      url(r'^password/reset/confirm/(?P<uidb64>[0-9A-Za-z]+)-(?P<token>.+)/$',
          auth_views.password_reset_confirm,
          name='password_reset_confirm'),
      url(r'^accounts/', include('registration.backends.simple.urls')),
  
      url(r'^accounts/password/reset/confirm', auth_views.password_change),
      url(r'^u/', include('dwitter.user.urls')),
  #    url(r'^dweet/', include('dwitter.dweet.urls')),
      url(r'^', include('dwitter.feed.urls')),
      url(r'^api/', include(router.urls)),
  ]
  
subject: Remove unused url from config