separate as a module

nixos/modules/user.nix

@@ -0,0 +1,15 @@
+{ pkgs, user, ... }: {
+  programs.zsh.enable = true;
+
+  users = {
+    defaultUserShell = pkgs.zsh;
+    users.${user} = {
+      isNormalUser = true;
+      extraGroups = [ "wheel" "networkmanager" ];
+      packages = with pkgs; [
+      ];
+    };
+  };
+
+  services.getty.autologinUser = user;
+}