How do I secure my chests?
You can secure normal chests as well as trapped chests by simply right-clicking on them with a sign, the sign will automatically lock the chest and make it accessible only by you.
How can give access to my chest to other players?
Simply click on the sign that you placed earlier and type in the command "/lock <sign line> <username>"! Make sure that the line you choose is empty! Furthermore, to add even more friends to your chest, just place another sign on the chest (any direction) and repeat the above step!
How can I remove someone from my chest?
Use the following command to remove someone from your private chest, "/lock <sign line>"! This command will remove the user that is on the sign line you have specified!