Chat::addUsersAction

public function addUsersAction(BitrixImV2Chat $chat, array $userIds, ?string $hideHistory = null): ?array
{
	$hideHistoryBool = $hideHistory === null ? null : $this->convertCharToBool($hideHistory, true);
	$chat->addUsers($userIds, [], $hideHistoryBool);

	return ['result' => true];
}