Add two-factor authentication application

configuration.nix

@@ -16,6 +16,7 @@
   environment.systemPackages = with pkgs; [
   #  vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
     ansible
+    authenticator # 2-factor auth, it's for Gnome but it's the only good one (can scan in from the phone etc)
     birdtray
     bitwarden-cli
     bitwarden-desktop