added user to jellyfin group.

configs/nixos/jellyfin.nix

@@ -8,6 +8,10 @@
   imports = [
     ./nginx.nix
   ];
+
+#allow us to manage jellyfins media.
+  users.users.${config.host.details.user}.extraGroups = ["jellyfin"];
+
   services.jellyfin = {
     enable = true;
     openFirewall = true;