【 Suggestion】Add gamemode and cheat lock
Difficulty Lock is very useful for modpack to increase the difficulty.
But player can use op command in server OR allow cheating when creating a single player game.

Can you add the following functions?
1、On the server, when the player is detected as an op, the op permission is deleted at any time.
2、When creating a single player game, players can only choose survival mode or hardcore mode, delete the choice of creative mode. Cheating is forced to close, and in the game, check whether cheating has started at regular intervals. When it is detected that a single player game has opened the cheating mode, it is forced to close.

In this way, no one can cheat with command，including op.....