diff --git a/flaschengeist/controller/sessionController.py b/flaschengeist/controller/sessionController.py
index 0737cd2..a3e08f8 100644
--- a/flaschengeist/controller/sessionController.py
+++ b/flaschengeist/controller/sessionController.py
@@ -92,6 +92,16 @@ def get_users_sessions(user):
     return Session.query.filter(Session._user == user)
 
 
+def delete_sessions(user):
+    """Deletes all active sessions of a user
+
+    Args:
+        user (User): User to delete all sessions for
+    """
+    Session.query.filter(Session._user_id == user._id).delete()
+    db.session.commit()
+
+
 def delete_session(token: Session):
     """Deletes given Session