A mod for 4D Miner by Mashpoe, based on Tr1NgleDev's 4dm.h modding framework.
The UUID is the string your account on a server is tied to, if anyone knows your UUID they can access all accounts on all servers you visited. If you join a server, the admin can see your UUID.
This mod changes the UUID based on the server address, so the owner of a server sees a UUID that is only used on their server.