protected $title = 'Member member register';

public function __construct($params = array())
{
    parent::__construct(array());
}

public function trigger($data, $member_id)
{

    $member = $this->channel_data->get_member($member_id)->row_array();

    $member['email'] = $_POST['email'];
    $member['postcode'] = $_POST['postcode'];
    $member['screen_name'] = $_POST['screen_name'];
    $member['home_phone'] = $_POST['home_phone'];

    return $this->send($parse_vars, $member);
}