hello, so I have a Minecraft server with a game. so the game has an economy, kills, shop custom stuff. the plugin isn't mine so I cant edit the code or change anything beside little config stuff. I thought of adding assists in a other plugin that I codded some stuff there for my server. the thing is I don't know how to code a working assists system, what to use etc. so my question is what do I need to useto code an assists system?