@Override
	public boolean execute(CommandSender sender, String[] args) {
		if(!(sender instanceof CommandSender)
				|| (sender instanceof Player && !sender.isOp())) {
			sender.sendMessage("You don't have permission to perform this command");
		}
		
		Collection<Member> members = memberManager.getAllMembers();
		if(members.size() == 0) {
			sender.sendMessage("No data");
			return true;
		}
		
		for(Member member : members) {
			sender.sendMessage(member.getName());
		}
		
		return true;
	}