initial himmelblau setup

modules/system/authentication/himmelblau.nix

@@ -0,0 +1,23 @@
+{ inputs, lib, pkgs, config, ... }: let
+  inherit (lib) mkEnableOption mkIf;
+
+  cfg = config.modules.authentication.himmelblau;
+in
+{
+  imports = [ inputs.himmelblau.nixosModules.himmelblau ];
+
+  options.modules.authentication.himmelblau = {
+    enable = mkEnableOption "enable azure entra ID authentication";
+  };
+
+  config = mkIf cfg.enable {
+    services.himmelblau = {
+      enable = true;
+      settings = {
+        domains = [];
+        pam_allow_groups = [];
+        local_groups = [];
+      };
+    };
+  };
+}