sub getToken {
    my $output = `curl -k -s -XPOST (URL) -dgrant_type=password -dclient_id=(client ID) -dclient_secret=(client secret) -dusername=(username) -dpassword=(password)`;   
    if ($output =~ /"access_token":"(.*)", "ex/g){
        return $1;
    }
    else {
        die "output not as expected...\n";
    }    
}