public static function set_password($inbound, $outbound) { Util::keys_required($inbound, array('id', 'password')); $stack = new Stack(Util::safe_stack_id($inbound['id']), Util::optional($inbound, 'auth_hash')); $outbound['record_version'] = $stack->stack_set_password($inbound['password']); return $outbound; }