create usenet user + group

nixarr/nixarr.nix

@@ -231,6 +231,7 @@ in {
       media.members = cfg.mediaUsers;
       streamer = {};
       torrenter = {};
+      usenet = {};
     };
     users.users = {
       streamer = {
@@ -241,6 +242,10 @@ in {
         isSystemUser = true;
         group = "torrenter";
       };
+      usenet = {
+        isSystemUser = true;
+        group = "usenet";
+      };
     };
 
     systemd.tmpfiles.rules = [