urlpatterns = [
path('2/', include((urlpatterns1, 'api'), namespace="v2")),
path('3/', include((urlpatterns1, 'api'), namespace="v3")),
+ path('4/', include((urlpatterns1, 'api'), namespace="v4")),
path('1/<path:path>', views.Unsupported.as_view()),
path('oauth/request_token/', csrf_exempt(views.OAuth1RequestTokenView.as_view())),