Use greetd as login manager

modules/greetd/default.nix

@@ -0,0 +1,36 @@
+{
+  pkgs,
+  lib,
+  ...
+}: let
+  sessions = builtins.concatStringsSep ":" [
+    (pkgs.writeTextFile {
+      name = "xorg-session.desktop";
+      destination = "/hyprland-session.desktop";
+      text = ''
+        [Desktop Entry]
+        Name=Hyprland
+        Exec=Hyprland
+      '';
+    })
+  ];
+in {
+  services.greetd = {
+    enable = true;
+    vt = 2;
+    settings = {
+      default_session = {
+        command = lib.concatStringsSep " " [
+          (lib.getExe pkgs.greetd.tuigreet)
+          "--time"
+          "--remember"
+          "--remember-user-session"
+          "--asterisks"
+          # "--power-shutdown '${pkgs.systemd}/bin/systemctl shutdown'"
+          "--sessions '${sessions}'"
+        ];
+        user = "greeter";
+      };
+    };
+  };
+}