AddGroup and Adduser component - Joomla! Forum - community, help and support

i've component forms. adduser groups (default group)

code: select all


function saveuser(){

$config = jcomponenthelper::getparams('com_users');
// default registered.
$defaultusergroup = $config->get('new_usertype', 2);
$instance = juser::getinstance(this->_email);
$instance->set('groups', array($defaultusergroup));
$instance->save(true);



when see on admin panel... "default" groups replace other groups user have it..

how can add "default" groups currentgroups user?