my $Url="http://twitter.com/users/show/".$twitterID.".xml";
my $username="something";
my $pwd="pwdSomething";
my $curl = LWP::UserAgent->new;		

$curl->setopt(CURLOPT_CONNECTTIMEOUT, 2);
$curl->setopt(CURLOPT_HEADER, false);
$curl->setopt(CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
$curl->setopt(CURLOPT_RETURNTRANSFER, 1);
$curl->setopt(CURLOPT_URL, $Url);
$curl->setopt(CURLOPT_USERPWD, "$username:$pwd");
$curl->setopt(CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
$curl->setopt( CURLOPT_POST, 1 );
my $xmlResponse = $curl->perform;