public function deleteServer ( $consumer_key, $user_id, $user_is_admin = false )
	{
		if ($user_is_admin)
		{
			$this->query('
					DELETE FROM oauth_consumer_registry
					WHERE ocr_consumer_key = \'%s\'
					  AND (ocr_usa_id_ref = %d OR ocr_usa_id_ref IS NULL)
					', $consumer_key, $user_id);
		}
		else
		{
			$this->query('
					DELETE FROM oauth_consumer_registry
					WHERE ocr_consumer_key = \'%s\'
					  AND ocr_usa_id_ref   = %d
					', $consumer_key, $user_id);
		}
	}