diff --git a/auth.js b/auth.js
index 706829c..1edf50d 100644
--- a/auth.js
+++ b/auth.js
@@ -1,3 +1,6 @@
+const debug = false;
+
+
 const couchdb_username = "admin";
 const couchdb_password = "admin";
 
diff --git a/lib/basic.js b/lib/basic.js
index 838ea2e..49d1f49 100644
--- a/lib/basic.js
+++ b/lib/basic.js
@@ -351,7 +351,7 @@ function form1(string) {
 async function getUserData(couchDB) {
 	let username = getURLArgsMap()["user"];
 	if (!username) {
-		if (typeof (debug_username) == "string") {
+		if (debug && typeof (debug_username) == "string") {
 			username = debug_username;
 		} else {
 			return null;
diff --git a/student/uebersicht.html b/student/uebersicht.html
index 4bcb5db..75d59e3 100644
--- a/student/uebersicht.html
+++ b/student/uebersicht.html
@@ -191,6 +191,7 @@
 <script>
 const couchDB = new CouchDB();
 setUserData(couchDB).then((val) => {
+	if (!val) return;
 	setCourseView();
 	setLevelProgress(userData.xp);
 	setLevel(userData.level);