How can i avoid passing Network Credentials while loading report programatically?

Hi

I have load the report programatically from the system. I dont want to give theredentials  in config file .so is there any way to avoid it so that any one can load report.Please help me ..

 NetworkCredential clientCredentials = new NetworkCredential(login, password, domain);

            rs = new ReportExecutionServiceSoapClient();

Thanks & Regards Manoj