diff --git a/backend/database.mv.db b/backend/database.mv.db
index 1b555f7..a0b7d04 100644
Binary files a/backend/database.mv.db and b/backend/database.mv.db differ
diff --git a/backend/database.trace.db b/backend/database.trace.db
index 71f72fe..e20ae35 100644
--- a/backend/database.trace.db
+++ b/backend/database.trace.db
@@ -223,3 +223,27 @@ Caused by: org.h2.mvstore.MVStoreException: The file is locked: D:/DH/TIF22A_Anw
 org.h2.jdbc.JdbcSQLSyntaxErrorException: Syntax Fehler in SQL Befehl "create table semester (id int auto_increment, startweeknumber int, endweeknumber int, name varchar(30), [*]year int)"; erwartet "identifier"
 Syntax error in SQL statement "create table semester (id int auto_increment, startweeknumber int, endweeknumber int, name varchar(30), [*]year int)"; expected "identifier"; SQL statement:
 create table semester (id int auto_increment, startweeknumber int, endweeknumber int, name varchar(30), year int) [42001-214]
+2023-05-08 13:43:07 database: wrong user or password; user: "ADM"
+org.h2.message.DbException: Falscher Benutzername oder Passwort
+Wrong user name or password [28000-214]
+	at org.h2.message.DbException.get(DbException.java:223)
+	at org.h2.message.DbException.get(DbException.java:199)
+	at org.h2.message.DbException.get(DbException.java:188)
+	at org.h2.engine.Engine.openSession(Engine.java:154)
+	at org.h2.engine.Engine.openSession(Engine.java:222)
+	at org.h2.engine.Engine.createSession(Engine.java:201)
+	at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:338)
+	at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:122)
+	at org.h2.util.JdbcUtils.getConnection(JdbcUtils.java:288)
+	at org.h2.server.web.WebServer.getConnection(WebServer.java:808)
+	at org.h2.server.web.WebApp.login(WebApp.java:1033)
+	at org.h2.server.web.WebApp.process(WebApp.java:226)
+	at org.h2.server.web.WebApp.processRequest(WebApp.java:176)
+	at org.h2.server.web.WebThread.process(WebThread.java:152)
+	at org.h2.server.web.WebThread.run(WebThread.java:101)
+	at java.base/java.lang.Thread.run(Thread.java:1623)
+Caused by: org.h2.jdbc.JdbcSQLInvalidAuthorizationSpecException: Falscher Benutzername oder Passwort
+Wrong user name or password [28000-214]
+	at org.h2.message.DbException.getJdbcSQLException(DbException.java:510)
+	at org.h2.message.DbException.getJdbcSQLException(DbException.java:477)
+	... 16 more
diff --git a/backend/src/main/java/com/example/backend/anwprj/DataBaseHandler.java b/backend/src/main/java/com/example/backend/anwprj/DataBaseHandler.java
index d521b5a..273ed67 100644
--- a/backend/src/main/java/com/example/backend/anwprj/DataBaseHandler.java
+++ b/backend/src/main/java/com/example/backend/anwprj/DataBaseHandler.java
@@ -26,7 +26,7 @@ public class DataBaseHandler
     {
         try
         {
-            connection = DriverManager.getConnection("jdbc:h2:./database", "adm", "12345");
+            connection = DriverManager.getConnection("jdbc:h2:./database", "adm", "73bgjfdsfJ!934");
             st = connection.createStatement();
         } catch (SQLException e)
         {
diff --git a/backend/src/main/java/com/example/backend/anwprj/Users/UserSessionIDHandler.java b/backend/src/main/java/com/example/backend/anwprj/Users/UserSessionIDHandler.java
index 972a9ed..d7bad8d 100644
--- a/backend/src/main/java/com/example/backend/anwprj/Users/UserSessionIDHandler.java
+++ b/backend/src/main/java/com/example/backend/anwprj/Users/UserSessionIDHandler.java
@@ -20,6 +20,19 @@ public class UserSessionIDHandler
             new Random().nextBytes(array);
             String generatedString = new String(array, StandardCharsets.UTF_8);
             mapping.put(generatedString, user);
+
+            new java.util.Timer().schedule(new java.util.TimerTask(){
+
+                @Override
+                public void run()
+                {
+                    mapping.remove(generatedString);
+                    System.out.println("test");
+                    return;
+                }
+                //value to be higher
+            }, 5000);
+
             return generatedString;
         }
 
diff --git a/backend/src/main/java/com/example/backend/anwprj/controller/UserController.java b/backend/src/main/java/com/example/backend/anwprj/controller/UserController.java
index d7ba266..dd8c723 100644
--- a/backend/src/main/java/com/example/backend/anwprj/controller/UserController.java
+++ b/backend/src/main/java/com/example/backend/anwprj/controller/UserController.java
@@ -26,7 +26,7 @@ public class UserController
             return new ResponseEntity<String>(UserSessionIDHandler.addUser(user.getMail(), user.getPassword()), HttpStatus.OK);
         }
 
-        return new ResponseEntity<String>("", HttpStatus.BAD_REQUEST);
+        return new ResponseEntity<String>(HttpStatus.BAD_REQUEST);
     }
 
     @CrossOrigin