perldoc lwpcook says:
ACCESS TO PROTECTED DOCUMENTS
Documents protected by basic authorization can easily be
accessed like this:
use LWP::UserAgent;
$ua = LWP::UserAgent->new;
$req = HTTP::Request->new(GET => 'http://www.linpro.no/secret
+/');
$req->authorization_basic('aas', 'mypassword');
print $ua->request($req)->as_string;
The other alternative is to provide a subclass of
LWP::UserAgent that overrides the get_basic_credentials()
method. Study the lwp-request program for an example of
this.
-- Randal L. Schwartz, Perl hacker