About this topic I would like to know if a new user who joins the server for the first time, and does not have permission, can use this system normally.
Only for himself as normal game.
Can you configure the file and the commands so that it can access and not grant permission to each player who enters the server?

I don't want to create groups on the server with this great tool.

If possible, please explain how it could be done.

Regards

All players that connect to your server is automatically in the "default" group via Oxide. You can grant the permissions to that group and they will have access. See Permissions for more information on permissions.

Excellent, thaks you very much for the great tutorial.