public static boolean isPlayerInList(
      String playername, HashSet<String> list, boolean allowCards) {
    if (playername.equals("CONSOLE")) return list.contains(playername);

    playername = playername.toLowerCase();

    if (allowCards) {
      if (list.contains("ALL")) return true;
      if ((ServerUtils.isPlayerOP(playername) || ServerUtils.isPlayerOwner(playername))
          && list.contains("OP")) return true;
    }

    return list.contains(playername);
  }