code: public void initialize(final int appId, final String appSecret, final String bridgeId,
        final ServerInfo serverInfo, final CallStatsInitListener callStatsInitListener) {
      if (StringUtils.isBlank(appSecret)) {
        logger.error("intialize: Arguments cannot be null ");
        throw new IllegalArgumentException("intialize: Arguments cannot be null");
      }
      initialize(appId, new TokenGeneratorHs256(appSecret.toCharArray(), appId, bridgeId), bridgeId,
          serverInfo, callStatsInitListener);
    }
docs: Initialize callstats.
  
  @param appId the app id
  @param appSecret the app secret
  @param bridgeId the bridge id
  @param serverInfo the server info
  @param callStatsInitListener the call stats init listener