Add route for login and permissions, return JSON on unauthorized API requests

marietje/api/urls.py

@@ -5,6 +5,8 @@ from . import views
 app_name = 'api'
 
 urlpatterns = [
+    url(r'^login', views.login_user),
+    url(r'^permissions', views.permissions),
     url(r'^songs', views.songs),
     url(r'^managesongs', views.managesongs),
     url(r'^queue', views.queue),