devices/elias-e525: add justyna and use gdm

nix/os/devices/elias-e525/pkg.nix

@@ -53,6 +53,12 @@ in
     variant = "";
   };
 
+  home-manager.users.justyna = homeEnv {
+    layout = "de";
+    options = [];
+    variant = "";
+  };
+
 
   services.teamviewer.enable = true;
   system.stateVersion = "21.11";

nix/os/devices/elias-e525/system.nix

@@ -40,6 +40,8 @@ in
       xkbVariant = lib.mkForce "";
       xkbOptions = lib.mkForce "";
       displayManager.autoLogin.enable = lib.mkForce false;
+      displayManager.gdm.enable = lib.mkForce true;
+      displayManager.lightdm.enable = lib.mkForce false;
       desktopManager.gnome.enable = true;
     };
 

nix/os/devices/elias-e525/user.nix

@@ -13,4 +13,10 @@ in {
     openssh.authorizedKeys.keys = keys.users.steveej.openssh;
     hashedPassword = passwords.users.elias;
   };
+
+  users.extraUsers.justyna = mkUser {
+    uid = 1002;
+    openssh.authorizedKeys.keys = keys.users.steveej.openssh;
+    hashedPassword = passwords.users.justyna;
+  };
 }