The right way to present a feed that requires person/cross inside a sidebar widget?

I am attempting to do one thing and I do not appear to yield any profitable outcomes when looking out neither at wordpress.org boards nor right here.

I wish to prolong the usual RSS widget in order that I can set an person/password for HTTP Authentication with a view to fetch the feed objects.

If there’s an present resolution that I am lacking and already offers this function, any pointer will probably be a lot appreciated.

Thanks.