Assuming you want to do http basic authentication (the kind where your browser pops up a window asking you for your username and password, as opposed to authentication where you enter your username and password in a form on another page), you can use an URL like the following: 

http://username:password@some.site/path/to/file

I hope this helps!

--
mowgli

In reply to Re: Grabbing Webpages with Usernames and Passwords by mowgli
in thread Grabbing Webpages with Usernames and Passwords by Anonymous Monk

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