{ 
  config, 
  pkgs,
  lib,
  ... 
}:
{
 options.custom = with lib; {
    displaymanager = {
      enable = mkEnableOption "Enable displaymanager";
    };
  };
 
 config = lib.mkIf config.custom.displaymanager.enable {
  services = {
    xserver = {
      enable = true;
      desktopManager = {
        xterm.enable = false;
      };
      displayManager = {
        lightdm = {
          enable = true;
          greeters.enso = {
            enable = true;
          };
        };
        session = [
          {
            manage = "window";
            name = "hm";
            start = ''
              export CURRENT_XSESSION="hm"
              ${pkgs.stdenv.shell} $HOME/.xsession-hm &
              waitPID=$!
            '';
          }
        ];
      };
      windowManager.i3 = {
        enable = true;
        extraPackages = with pkgs; [
          dmenu
          i3status
          i3lock
        ];
      };
    };
    xserver.xkb.layout = "us";
    gnome.gnome-keyring.enable = true;
  };

  security.polkit.enable = true;
 };
}