public function register()
 {
     $this->view->error = false;
     if (isset($_POST['register'])) {
         $username = $_POST['username'];
         $password = $_POST['password'];
         $player = new Player($username, $password);
         if (!$player->save()) {
             $this->view->error = 'duplicate users';
         }
         $this->login();
     }
 }