protected function fetchAttributes()
{
$info = (array) $this->makeSignedRequest('https://www.googleapis.com/oauth2/v1/userinfo');
$this->attributes['id'] = $info['id'];
$this->attributes['name'] = $info['name'];
$this->attributes['email'] = $info['email'];
if (!empty($info['link'])) {
$this->attributes['url'] = $info['link'];
}
}