fix: Use the new countUsersTotal method where it makes sense

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

apps/dav/lib/Migration/Version1027Date20230504122946.php

@@ -33,7 +33,7 @@ class Version1027Date20230504122946 extends SimpleMigrationStep {
 	 * @param array $options
 	 */
 	public function postSchemaChange(IOutput $output, Closure $schemaClosure, array $options): void {
-		if ($this->userManager->countSeenUsers() > 100 || array_sum($this->userManager->countUsers()) > 100) {
+		if ($this->userManager->countSeenUsers() > 100 || $this->userManager->countUsersTotal(100) >= 100) {
 			$this->config->setAppValue('dav', 'needs_system_address_book_sync', 'yes');
 			$output->info('Could not sync system address books during update - too many user records have been found. Please call occ dav:sync-system-addressbook manually.');
 			return;

lib/base.php

@@ -279,8 +279,7 @@ class OC {
 			}
 			if (!$tooBig) {
 				// count users
-				$stats = Server::get(\OCP\IUserManager::class)->countUsers();
-				$totalUsers = array_sum($stats);
+				$totalUsers = Server::get(\OCP\IUserManager::class)->countUsersTotal(51);
 				$tooBig = ($totalUsers > 50);
 			}
 		}