plugin command permission
permission 1: coins.player.commands
permission 2: coins.player.admin

first command: /coin help

/coin: look your coin
/coin show <username> look online player coin
/coin send <username> send coin online player
/coin add <username> <amount> add coin to player
/coin set <username> <amount> set coin to player
/coin delete<username> <amount> remove coin to player
/coin delete<username> rset coin to player

Plugin api: https://www.spigotmc.org/resources/bukkitapi.105798/
github site: https://github.com/HyperLords
Discord name: EZberCime#1532