my $server = Server->connect(
  host => auth.domain.com
  user => $user,
  pass => $pass
);

my $root = $server->getRoot; # this is a proxied object
my $users = $root->getUsers; # another proxied object
my $fergal = $users->getUser("fergal");
$fergal->setPasswd("wibble");
$fergal->setShell("/bin/zoidberg");
$fergal->commit;