Add new method to flush session variables

app/Core/Security/AuthenticationManager.php

@@ -71,7 +71,7 @@ class AuthenticationManager extends Base
         if ($this->userSession->isLogged() ) {
             foreach ($this->filterProviders('SessionCheckProviderInterface') as $provider) {
                 if (! $provider->isValidSession()) {
-                    unset($this->sessionStorage->user);
+                    $this->sessionStorage->flush();
                     $this->preAuthentication();
                     return false;
                 }

app/Core/Session/SessionStorage.php

@@ -61,6 +61,21 @@ class SessionStorage
         return $session;
     }
 
+    /**
+     * Flush session data
+     *
+     * @access public
+     */
+    public function flush()
+    {
+        $session = get_object_vars($this);
+        unset($session['storage']);
+
+        foreach (array_keys($session) as $property) {
+            unset($this->$property);
+        }
+    }
+
     /**
      * Copy class properties to external storage
      *