Only add 'Anmelden' item to nav if user is not authenticated

shiftregister/app/signals.py

@@ -45,6 +45,9 @@ def populate_app_nav(sender, **kwargs):
     request = sender
     nav_items = []
 
+    if request.user.is_authenticated:
+        return nav_items
+
     helper = request.helper
     if helper is None:
         nav_items.append({"link": reverse("register"), "text": "Anmelden"})