QrCodeAuth::getUniqueId

static function getUniqueId()
{
	$uniqid = ConfigOption::get('main', '~public_uniq_id', '');

	if ($uniqid == '')
	{
		$uniqid = SecurityRandom::getString(16, true);
		ConfigOption::set('main', '~public_uniq_id', $uniqid);
	}

	return $uniqid;
}