code: private static String getReplierExportStrategyValue(ReplierExportStrategy replierExportStrategy, QueryReply queryReply) {
      if (queryReply != null) {
        User user = queryReply.getUser();
        if (user != null) {
          switch (replierExportStrategy) {
            case NONE:
            break;
            case HASH:
              return RequestUtils.md5EncodeString(String.valueOf(user.getId()));
            case NAME:
              return user.getFullName(true, false);
            case EMAIL:
              return user.getDefaultEmailAsString();
          }
        }
      }
      
      return "-";
    }
docs: Returns user identifier for given replier export strategy
  
  @param replierExportStrategy replier export strategy
  @param queryReply reply
  @return user identifier