protected function Get401AuthUsername($qs_username_field = "")
	{
		$qsv = $qs_username_field ? RequestUtil::Get($qs_username_field) : '';
		return $qsv ? $qsv : Auth401::GetUsername();
	}
protected function Get401AuthUsername($qs_username_field = "")
	{
		$qsv = $qs_username_field ? RequestUtil::Get($qs_username_field) : '';
		return $qsv ? $qsv : Auth401::GetUsername();
	}
protected function Get401AuthUsername ( $ qs_username_field = "" ) { $ qsv = $ qs_username_field ? RequestUtil :: Get ( $ qs_username_field ) : '' ; return $ qsv ? $ qsv : Auth401 :: GetUsername ( ) ; }
accept username passed in either headers or querystring.  if a querystring parameter name is
provided, that will be checked first before the 401 auth headers
@param string $qs_username_field the querystring parameter to check for username (optional)
accept username passed in either headers or querystring . if a querystring parameter name is provided that will be checked first before the 401 auth headers