From 0caf43ff07dec5cfb4263dccd5659f4f414b43dc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Julius=20H=C3=A4rtl?= <jus@bitgrid.net>
Date: Tue, 10 Oct 2023 08:19:41 +0200
Subject: [PATCH] fix: Implement IGetDisplayNameBackend
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Signed-off-by: Julius Härtl <jus@bitgrid.net>
---
 lib/UserBackend.php | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/UserBackend.php b/lib/UserBackend.php
index b5b0a6a3d..744cc3ca0 100644
--- a/lib/UserBackend.php
+++ b/lib/UserBackend.php
@@ -36,10 +36,11 @@
 use OCP\IUserManager;
 use OCP\IUserSession;
 use OCP\Server;
+use OCP\User\Backend\IGetDisplayNameBackend;
 use OCP\User\Events\UserChangedEvent;
 use OCP\UserInterface;
 
-class UserBackend implements IApacheBackend, UserInterface, IUserBackend {
+class UserBackend implements IApacheBackend, UserInterface, IUserBackend, IGetDisplayNameBackend {
 	/** @var IConfig */
 	private $config;
 	/** @var IURLGenerator */
@@ -308,9 +309,9 @@ public function setDisplayName($uid, $displayName) {
 	 *
 	 * @param string $uid user ID of the user
 	 * @return string display name
-	 * @since 4.5.0
+	 * @since 14.0.0
 	 */
-	public function getDisplayName($uid) {
+	public function getDisplayName($uid): string {
 		if ($backend = $this->getActualUserBackend($uid)) {
 			return $backend->getDisplayName($uid);
 		} else {
@@ -328,7 +329,7 @@ public function getDisplayName($uid) {
 			}
 		}
 
-		return false;
+		return $uid;
 	}
 
 	/**