CAllUser::GetParam

public function GetParam($name)
{
	if (isset(static::$kernelSession["SESS_AUTH"][$name]))
	{
		return static::$kernelSession["SESS_AUTH"][$name];
	}
	else
	{
		// compatibility
		switch ($name)
		{
			case 'USER_ID':
				return (string)$this->getContext()->getUserId();

			case 'APPLICATION_ID':
				return $this->getContext()->getApplicationId();
		}
	}
	return null;
}