diff --git a/apps/dav/lib/CardDAV/SyncService.php b/apps/dav/lib/CardDAV/SyncService.php
index 6f6fa0ba379e3..4a713daeba0b4 100644
--- a/apps/dav/lib/CardDAV/SyncService.php
+++ b/apps/dav/lib/CardDAV/SyncService.php
@@ -319,7 +319,7 @@ public function getLocalSystemAddressBook() {
 
 	public function syncInstance(\Closure $progressCallback = null) {
 		$systemAddressBook = $this->getLocalSystemAddressBook();
-		$this->userManager->callForAllUsers(function($user) use ($systemAddressBook, $progressCallback) {
+		$this->userManager->callForSeenUsers(function($user) use ($systemAddressBook, $progressCallback) {
 			$this->updateUser($user);
 			if (!is_null($progressCallback)) {
 				$progressCallback();
diff --git a/apps/dav/lib/Command/SyncBirthdayCalendar.php b/apps/dav/lib/Command/SyncBirthdayCalendar.php
index 88f85a9881278..3d1bcab6c3162 100644
--- a/apps/dav/lib/Command/SyncBirthdayCalendar.php
+++ b/apps/dav/lib/Command/SyncBirthdayCalendar.php
@@ -92,7 +92,7 @@ protected function execute(InputInterface $input, OutputInterface $output) {
 		$output->writeln("Start birthday calendar sync for all users ...");
 		$p = new ProgressBar($output);
 		$p->start();
-		$this->userManager->callForAllUsers(function($user) use ($p)  {
+		$this->userManager->callForSeenUsers(function($user) use ($p)  {
 			$p->advance();
 
 			$userId = $user->getUID();
diff --git a/apps/dav/lib/Controller/BirthdayCalendarController.php b/apps/dav/lib/Controller/BirthdayCalendarController.php
index 244111e3aec41..4964de0b216c5 100644
--- a/apps/dav/lib/Controller/BirthdayCalendarController.php
+++ b/apps/dav/lib/Controller/BirthdayCalendarController.php
@@ -93,7 +93,7 @@ public function enable() {
 		$this->config->setAppValue($this->appName, 'generateBirthdayCalendar', 'yes');
 
 		// add background job for each user
-		$this->userManager->callForAllUsers(function(IUser $user) {
+		$this->userManager->callForSeenUsers(function(IUser $user) {
 			$this->jobList->add(GenerateBirthdayCalendarBackgroundJob::class, [
 				'userId' => $user->getUID(),
 			]);
diff --git a/apps/dav/lib/Migration/RegenerateBirthdayCalendars.php b/apps/dav/lib/Migration/RegenerateBirthdayCalendars.php
index 2c2b4eb0e9ac1..263e6d00db460 100644
--- a/apps/dav/lib/Migration/RegenerateBirthdayCalendars.php
+++ b/apps/dav/lib/Migration/RegenerateBirthdayCalendars.php
@@ -72,7 +72,7 @@ public function run(IOutput $output) {
 		}
 
 		$output->info('Adding background jobs to regenerate birthday calendar');
-		$this->userManager->callForAllUsers(function(IUser $user) {
+		$this->userManager->callForSeenUsers(function(IUser $user) {
 			$this->jobList->add(GenerateBirthdayCalendarBackgroundJob::class, [
 				'userId' => $user->getUID(),
 				'purgeBeforeGenerating' => true
@@ -82,4 +82,4 @@ public function run(IOutput $output) {
 		// if all were done, no need to redo the repair during next upgrade
 		$this->config->setAppValue('dav', 'regeneratedBirthdayCalendarsForYearFix', 'yes');
 	}
-}
\ No newline at end of file
+}
diff --git a/apps/dav/tests/unit/Controller/BirthdayCalendarControllerTest.php b/apps/dav/tests/unit/Controller/BirthdayCalendarControllerTest.php
index 46ed58df4f939..a105daa2608dc 100644
--- a/apps/dav/tests/unit/Controller/BirthdayCalendarControllerTest.php
+++ b/apps/dav/tests/unit/Controller/BirthdayCalendarControllerTest.php
@@ -78,7 +78,7 @@ public function testEnable() {
 			->with('dav', 'generateBirthdayCalendar', 'yes');
 
 		$this->userManager->expects($this->once())
-			->method('callForAllUsers')
+			->method('callForSeenUsers')
 			->will($this->returnCallback(function($closure) {
 				$user1 = $this->createMock(IUser::class);
 				$user1->method('getUID')->will($this->returnValue('uid1'));
diff --git a/apps/dav/tests/unit/Migration/RegenerateBirthdayCalendarsTest.php b/apps/dav/tests/unit/Migration/RegenerateBirthdayCalendarsTest.php
index 05e12bbda6ef8..74af6af88dcd2 100644
--- a/apps/dav/tests/unit/Migration/RegenerateBirthdayCalendarsTest.php
+++ b/apps/dav/tests/unit/Migration/RegenerateBirthdayCalendarsTest.php
@@ -76,7 +76,7 @@ public function testRun() {
 			->with('Adding background jobs to regenerate birthday calendar');
 
 		$this->userManager->expects($this->once())
-			->method('callForAllUsers')
+			->method('callForSeenUsers')
 			->will($this->returnCallback(function($closure) {
 				$user1 = $this->createMock(IUser::class);
 				$user1->method('getUID')->will($this->returnValue('uid1'));
@@ -128,10 +128,10 @@ public function testRunSecondTime() {
 			->with('Repair step already executed');
 
 		$this->userManager->expects($this->never())
-			->method('callForAllUsers');
+			->method('callForSeenUsers');
 
 		$this->migration->run($output);
 	}
 
 
-}
\ No newline at end of file
+}
diff --git a/lib/private/User/Database.php b/lib/private/User/Database.php
index 905a199a1a622..27dcb2fc33163 100644
--- a/lib/private/User/Database.php
+++ b/lib/private/User/Database.php
@@ -59,7 +59,6 @@
 
 use OC\Cache\CappedMemoryCache;
 use OCP\IDBConnection;
-use OCP\ILogger;
 use OCP\User\Backend\ABackend;
 use OCP\User\Backend\ICheckPasswordBackend;
 use OCP\User\Backend\ICountUsersBackend;
@@ -68,7 +67,6 @@
 use OCP\User\Backend\IGetHomeBackend;
 use OCP\User\Backend\ISetDisplayNameBackend;
 use OCP\User\Backend\ISetPasswordBackend;
-use OCP\Util;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\EventDispatcher\GenericEvent;