Bolt\Users::saveUser PHP Method

    public function saveUser($user)
    {
        if (is_array($user)) {
            $user = new Entity\Users($user);
        }
        // Make sure the username is slug-like
        $user->setUsername($this->app['slugify']->slugify($user->getUsername()));
        // Save the entity
        return $this->getRepository()->save($user);
    }

 /**
  * Persist the contents of the current stack to the session, as well as the database.
  */
 private function persist()
 {
     $items = $this->persistableList();
     $this->session->set('stack', $items);
     $user = $this->users->getCurrentUser();
     $user['stack'] = $items;
     $this->users->saveUser($user);
 }