Bukkit

I dont know if its supposed to be like this, but I couldnt find anywhere where it describes how to use the permissions. I know how to make a permission node for a command, and error messages and all that. but how do you like give/revoke someones permission to use a specific command?

Just using Permission Manager Plugin like LuckPerms, do /lp user player_name permission set/settemp permission.node true (timestamp if you settemp) 

To revoke a player permission, just replace set/settemp to unset/unsettemp

And every Permission Manager Plugin require Vault.