public function bind(array $taintedValues = null, array $taintedFiles = null)
 {
     if ($this->getUser()->getAttribute('profile_image_url', null, 'twitter')) {
         $taintedValues['avatar'] = $this->getUser()->getAttribute('profile_image_url', null, 'twitter');
     }
     $taintedValues['twitter_id'] = $this->getUser()->getAttribute('screen_name', null, 'twitter');
     parent::bind($taintedValues);
 }
 public function bind(array $taintedValues = null, array $taintedFiles = null)
 {
     parent::bind(array_merge($taintedValues, array('id' => sfContext::getInstance()->getUser()->getId())));
 }