Ok, so I am coding a plugin. I hooked in to permissions, (I think) and I want to know how I can make a command with a specified playername toggle a player on a hashmap. For Example: /commandexample captainawesome7 I want that to toggle captainawesome7 on a hashmap, to make certain features work for me and not others, but also to make it configurable (so others can add themselves and other people as well). For another example, lets say my plugin kicks you from the server if you break TNT without being on the hashmap. How would I implement that? Btw, that isn't what my plugin is going to do, it was just an example. Or if a player breaks a block and he is on the hashmap, how would I make a command that can add a specified playername to a hashmap?