Open GUI on login

OpenGuiTask

@SideOnly(Side.CLIENT)
public class OpenGuiTask implements Runnable {
    private String modId;
    private int guiId;
    
    public OpenGuiTask(String modId, int guiId) {
        this.modId = modId;
        this.guiId = guiId;
    }
    
    @Override
    public void run() {
        EntityPlayer player = Minecraft.getMinecraft().thePlayer;
        player.openGui(modId, guiId, player.worldObj, (int)player.posX, (int)player.posY, (int)player.posZ);
    }
}