public function login($uid = null)
 {
     if (null !== $uid) {
         $this->user->login(models\User::get($uid));
     }
     if ($this->user->isLoggedIn()) {
         $this->_redirect('/blog');
     }
     if ($this->POST) {
         $post = options($_POST);
         $get = options($_GET);
         try {
             // get user object
             $user = models\User::withCredentials(array('username' => (string) $post->username, 'password' => (string) $post->password));
             // log user in(to SessionUser)
             $this->user->login($user);
             // debug direct logged in status
             Session::message('<pre>' . var_export($this->user->isLoggedIn(), 1) . '</pre>');
             // message OK
             Session::success('Alright, alright, alright, you\'re logged in...');
             // back to blog
             return $this->_redirect($post->get('goto', $get->get('goto', 'blog')));
         } catch (\Exception $ex) {
         }
         // message FAIL
         Session::error('Sorry, buddy, that\'s not your username!');
     }
     $messages = Session::messages();
     return get_defined_vars();
 }