Start migration to using flake-parts

features-nixos/optional/authentication.nix

@@ -0,0 +1,31 @@
+{
+  flake.nixosModules.authentication = {
+    pkgs,
+    lib,
+    ...
+  }: {
+    # Make programs like nextcloud client access saved passwords
+    services.gnome.gnome-keyring.enable = true;
+
+    programs.seahorse.enable = true;
+    programs.ssh.askPassword = lib.mkForce "${pkgs.seahorse}/libexec/seahorse/ssh-askpass"; # Solve conflicting definition in seahorse and plasma6
+
+    # Make authentication work for e.g. gparted
+    security.polkit.enable = true;
+    systemd = {
+      user.services.polkit-gnome-authentication-agent-1 = {
+        description = "polkit-gnome-authentication-agent-1";
+        wantedBy = ["graphical-session.target"];
+        wants = ["graphical-session.target"];
+        after = ["graphical-session.target"];
+        serviceConfig = {
+          Type = "simple";
+          ExecStart = "${pkgs.polkit_gnome}/libexec/polkit-gnome-authentication-agent-1";
+          Restart = "on-failure";
+          RestartSec = 1;
+          TimeoutStopSec = 10;
+        };
+      };
+    };
+  };
+}