old_contents: from django.conf.urls import url, include
  from rest_framework.authtoken.views import obtain_auth_token
  from . import views
  
  urlpatterns = [
      url(r'^generate_pdf/(?P<bill_id>\d+)$', views.generate_pdf,
          name='generate-pdf'),
      url(r'^user/$', views.UserAdmin.as_view(), name='user'),
      url(r'^user/(?P<pk>[0-9]+)/$', views.UserAdminDetail.as_view(),
          name='user-detail'),
      url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework')),
      url(r'^api-token-auth/', obtain_auth_token, name='api-token-auth')
      ]
  
new_contents: from django.conf.urls import url, include
  from rest_framework.authtoken.views import obtain_auth_token
  from . import views
  
  api_patterns = [
          url(r'^auth/',
              include('rest_framework.urls', namespace='rest_framework')),
          url(r'^token-auth/', obtain_auth_token, name='api-token-auth'),
          url(r'^users/$', views.UserAdmin.as_view(), name='users-api'),
          url(r'^users/(?P<pk>[0-9]+)/$', views.UserAdminDetail.as_view(),
              name='users-detail-api'),
          ]
  
  urlpatterns = [
          url(r'api/1.0/', include(api_patterns)),
          url(r'^generate_pdf/(?P<bill_id>\d+)$', views.generate_pdf,
              name='generate-pdf'),
          ]
  
subject: Move api auth url to api_patterns