The Chest Protection System
You can easily unlock and lock objects by typing the command /lock or /unlock and then clicking on the object.
Once an object is locked you can hold shift and left click on the object OR type /protect and left click which will bring up the settings menu for that object!
How to add someone to an object?
Using the protection system, you can give individual players access to an object.
In the menu, go into the “Members” section and then click on the green skull that says “Trust player” you can then type in the username you would like to add. From here you can remove member permission or promote them to 'admin', meaning they can also trust other players to this item. Another way to do this is by typing /trust [player] then clicking on the object
How to add a group to an object?
You are able to create groups which you can then add users to. Once that group is added to an object that will give all the users in the group access to use the object.
If you go to the 'groups' section of the menu you can create a group and give it a name. Then all you have to do is simply left click on the group you would like to add and that will add everyone inside that group to the object.
To remove the group from the object you can hover over the “Edit Group” section in the main object menu and just press the “Q” Key.
There is a lot of customisation for the chest protection system. You can get more in depth information here: The protection system in detail
All shulker boxes