diff --git a/appinfo/info.xml b/appinfo/info.xml
index ecb5648..a88ea50 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -4,7 +4,7 @@
     <name>Preferred Providers</name>
     <summary>Allow nextcloud to request user accounts</summary>
     <description><![CDATA[Allow nextcloud to request user accounts]]></description>
-    <version>1.13.0</version>
+    <version>1.13.1</version>
     <licence>agpl</licence>
     <author>John Molakvoæ</author>
     <namespace>Preferred_Providers</namespace>
diff --git a/js/users-management.js b/js/users-management.js
index a8ceaa8..1306658 100644
--- a/js/users-management.js
+++ b/js/users-management.js
@@ -1,5 +1,4 @@
 $(document).ready(function() {
-
 	sendEmail = function(event) {
 		var userId = event.target.closest('div[data-id]').dataset.id;
 		var button = event.target.parentElement;
diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
index 032f883..39cd40d 100644
--- a/lib/AppInfo/Application.php
+++ b/lib/AppInfo/Application.php
@@ -28,6 +28,7 @@
 use OCA\Preferred_Providers\Hook\LoginHook;
 use OCA\Preferred_Providers\Notification\Notifier;
 use OCP\AppFramework\App;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IServerContainer;
 use OCP\Util;
 
@@ -36,13 +37,18 @@ class Application extends App {
 
 	public function __construct() {
 		parent::__construct(self::APP_ID);
-	}
 
-	public function register() {
-		$this->registerNotifier($this->getContainer()->getServer());
-		$this->getContainer()->query(LoginHook::class)->register();
+		$container = $this->getContainer();
+		$server = $container->query(IServerContainer::class);
+
+		$this->registerNotifier($server);
+
+		/** @var LoginHook */
+		$loginHook = $container->query(LoginHook::class);
+		$loginHook->register();
 
-		$eventDispatcher = $this->getContainer()->getServer()->getEventDispatcher();
+		/** @var IEventDispatcher */
+		$eventDispatcher = $server->query(IEventDispatcher::class);
 		$eventDispatcher->addListener('OC\Settings\Users::loadAdditionalScripts',
 			function () {
 				Util::addScript(self::APP_ID, 'users-management');
diff --git a/lib/Controller/SettingsController.php b/lib/Controller/SettingsController.php
index 63abeee..0fb2f26 100644
--- a/lib/Controller/SettingsController.php
+++ b/lib/Controller/SettingsController.php
@@ -152,7 +152,7 @@ public function resetToken(): DataResponse {
 	 * @return DataResponse
 	 * @throws OCSNotFoundException
 	 */
-	public function setGroups(array $groups, string $for = 'all'): DataResponse {
+	public function setGroups(array $groups = [], string $for = 'all'): DataResponse {
 		foreach ($groups as $groupId) {
 			if (!$this->groupManager->groupExists($groupId)) {
 				throw new OCSNotFoundException($groupId . ' does not exists');