How to Configure SSRS Web Service URL and Web Portal URL via Command Line

I need to apply the default settings on SSRS Web Service URL and Web Portal URL, but i need to do it automatically somehow. Is it possible to do it via command line? I have looked through this SSRS documentation from Microsoft, but don't see any option to do that. As per Microsoft, You must write custom code that makes calls into the Report Server WMI provider. There are no command line utilities or script templates for configuring the URLs.