use warnings;
use HTML::Tree;
use LWP::Simple;
use WWW::Mechanize;
use HTTP::Request::Common;
use Data::Dumper;

my $username = "user";
my $password = "pass";
my $site_url = 'http://www.tennisinsight.com/myTI.php'; 
my $mech = WWW::Mechanize->new( autocheck => 1 );


# print $mech->content;

my $response = $mech->post($site_url , 
    [
       'username' => $username,
       'password' => $password,
    ]) ;
my $cookie_jar = HTTP::Cookies->new;
$cookie_jar->extract_cookies( $response );

print $cookie_jar;