@Override
    public Collection<String> getPlayerList() {
        return getServer().map(server -> {
            Collection<ServerPlayer> players = server.onlinePlayers();
            List<String> list = new ArrayList<>(players.size());
            for (Player player : players) {
                list.add(player.name());
            }
            return list;
        }).orElse(Collections.emptyList());
    }
Injected configuration directory for the plugin
sponge/src/main/java/me/lucko/luckperms/sponge/LPSpongeBootstrap.java