file_get_contents from a passworded page

[HaLo2FrEeEk]

Hey guys, I was wondering if there was a way to get use file_get_contents (or an alias of it, I use snoopy library, or curl) to get the contents of a page only accessible by logging in to a system.  What I'm trying to do is get information from a page where I have to log in with my .Net passport, then I can view the page.  Is there a way to sign my server in to the .net passport to get the information, then sign it back out?  I've used snoopy for a while and it's great, and there is an option that seems like it would work, but I can't figure it out, I've tried many different ways.  If there is a way to do this I will be so appreciative.  Thank you.