Merge pull request #6642 from nextcloud/fix/public-dav

fix: Avoid failing on public dav URLs

Author: luka-nextcloud

lib/Service/CardService.php

@@ -38,7 +38,7 @@
 
 class CardService {
 
-	private string $currentUser;
+	private ?string $currentUser;
 
 	public function __construct(
 		private CardMapper $cardMapper,