onPlayerSleepInBed

@SubscribeEvent
public void onPlayerSleepInBed(SleepingTimeCheckEvent event) {
    Player entity = event.getEntity();
    Level level = entity.getLevel();
    MinecraftServer server = level.getServer();

    if(level.isClientSide())
        return;

    if(server == null) {
        System.err.println("Server was null on SleepingTimeCheckEvent, unable to teleport player");
        return;
    }

    System.out.println("SleepingTimeCheckEvent: " + entity.getDisplayName().getString() + "; " + entity.getSleepTimer());

    if (entity.getSleepTimer() >= 100) {
        entity.stopSleeping();

        ServerLevel sleepDimension = server.getLevel(DimensionsInit.SLEEP_DIM_KEY);
        if(sleepDimension == null) {
            System.err.println("Sleep dimension level was null, unable to teleport");
            return;
        }

        System.out.println("Teleporting player...");
        entity.changeDimension(sleepDimension);
    }
}