return empty items list if user not logged in (#8309)

lingo/models.py

@@ -109,6 +109,7 @@ class Regie(models.Model):
                 if items.get('data'):
                     return [build_remote_item(item, self) for item in items.get('data')]
                 return []
+        return []
 
     def download_item(self, request, item_id):
         """