Kohana_Auth_ORM::auto_login PHP Method

    public function auto_login()
    {
        if ($token = Cookie::get($this->_config['autologin_key'])) {
            // Load the token and user
            $token = ORM::factory('user_token', array('token' => $token));
            if ($token->loaded() and $token->user->loaded()) {
                if ($token->user_agent === sha1(Request::$user_agent)) {
                    // Save the token to create a new unique token
                    $token->save();
                    // Set the new token
                    Cookie::set($this->_config['autologin_key'], $token->token, $token->expires - time());
                    // Complete the login with the found data
                    $this->complete_login($token->user);
                    // Automatic login was successful
                    return $token->user;
                }
                // Token is invalid
                $token->delete();
            }
        }
        return FALSE;
    }