enable fingerprint authentication

closes #21

nixos/default.nix

@@ -24,12 +24,21 @@
       enable = true;
       drivers = [ pkgs.hplip pkgs.gutenprint ];
     };
+
+    fprintd = {
+      enable = true;
+
+      tod = {
+        enable = true;
+        driver = pkgs.libfprint-2-tod1-vfs0090;
+      };
+    };
   };
 
   users = {
     users.pim = {
       isNormalUser = true;
-      extraGroups = [ "wheel" "docker" ];
+      extraGroups = [ "wheel" "docker" "input" ];
     };
   };