hosts/sarien: add autologin

Signed-off-by: unexplrd <unexplrd@linerds.us>

hosts/sarien/configuration.nix

@@ -1,4 +1,8 @@
-{inputs, ...}: {
+{
+  inputs,
+  pkgs,
+  ...
+}: {
   imports = with inputs; [
     self.nixosModules.desktop
     self.nixosModules.system
@@ -20,6 +24,10 @@
   time.timeZone = "Europe/Kyiv";
 
   desktop.niri.enable = true;
+  services.greetd.settings.initial_session = {
+    user = "user";
+    command = "${pkgs.niri}/bin/niri-session";
+  };
 
   module = {
     config = {