implementing modules for system applications

system/modules/sysd/greetd/default.nix

@@ -0,0 +1,30 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib) mkIf mkEnableOption;
+  cfg = config.modules.sysd.greetd;
+in {
+  options = {
+    modules.sysd.greetd.enable = mkEnableOption "Enables greetd";
+  };
+  config = mkIf cfg.enable {
+    services.greetd = {
+      enable = true;
+      settings = {
+        # AUTOLOGIN
+        # initial_session = {
+        #   command = "${pkgs.hyprland}/bin/Hyprland";
+        #   user = "cnst"; # <- select which user to auto-login
+        # };
+        default_session = {
+          command = "${pkgs.greetd.tuigreet}/bin/tuigreet -r --remember-session --asterisks";
+          user = "greeter";
+        };
+      };
+    };
+    security.pam.services.greetd.enableGnomeKeyring = true;
+  };
+}