Room result = roomRepository.save(new Room(
                input.getRoomName(),
                0,
                new Date().from(LocalDate.now().atStartOfDay(ZoneId.systemDefault()).toInstant())
        ));

        int usersLength = input.getUsers().length;
        long[] users = input.getUsers();
        for(int i = 0; i < usersLength; i++){
            User user = userRepository.findById(users[i]).orElse(null);
            if(user != null)
                userRoomRepository.save(new UserRoom(
                        user,
                        result
                ));
        }