public void addPlayer(Player p, int id, int size){
		for(Arena a : arenas){
			if(a.getPlayers().contains(p.getName())){
				p.sendMessage("You are already in an arena");
				return;
			}
		}
		Arena a = getArena(id);
		if(a.getSize() == size){
			p.sendMessage("The arena is full");
			return;
		}
		if(a.getPlayers().contains(p.getName())){
			p.sendMessage("You are already in that arena");
			return;
		}
		a.addPlayer(p);
		p.teleport(a.getSpawn());
		p.sendMessage("You have joined the arena");
	}