old_contents: from django.conf.urls import include, url
  from django.contrib import admin
  admin.autodiscover()
  from api_views import api_root
  from rest_framework.authtoken.views import obtain_auth_token
  from rest_framework_docs.views import documentation
  
  urlpatterns = [
      url(r'^', include('authenticate.urls')),
      url(r'^', include('repository.urls')),
      # (r'^admin/', include(admin.site.urls)),
      url(r'^api/$', api_root),
      url(r'^api/token-auth/$', obtain_auth_token, name='api-token-auth'),
      url(r'^api/', include('rest_framework.urls', namespace='rest_framework')),
      url(r'^api/docs/', include('rest_framework_docs.urls', namespace='rest_framework_docs')),
      url(r'^api/docs/$', documentation, name='api-docs')
  ]
  
new_contents: from django.conf.urls import include, url
  from django.contrib import admin
  admin.autodiscover()
  from api_views import api_root
  from rest_framework.authtoken.views import obtain_auth_token
  from rest_framework_swagger.views import get_swagger_view
  
  schema_view = get_swagger_view(title='ReFlow API')
  
  urlpatterns = [
      url(r'^', include('authenticate.urls')),
      url(r'^', include('repository.urls')),
      # (r'^admin/', include(admin.site.urls)),
      url(r'^api/$', api_root),
      url(r'^api/token-auth/$', obtain_auth_token, name='api-token-auth'),
      url(r'^api/', include('rest_framework.urls', namespace='rest_framework')),
      url(r'^api/docs/', schema_view)
  ]
  
subject: Update urls.py