if (value != null) {
            return value;
        }
        return get("elasticsearch.username");
    }

    String getSearchEnginePassword();

    default String getFesenPassword() {
        final String value = getSearchEnginePassword();
        if (value != null) {
            return value;
        }
        return get("elasticsearch.password");
    }

                .put("http.heartbeat_interval", fessConfig.getFesenHeartbeatInterval());
        final String username = fessConfig.getFesenUsername();
        final String password = fessConfig.getFesenPassword();
        if (StringUtil.isNotBlank(username) && StringUtil.isNotBlank(password)) {
            builder.put(Constants.FESEN_USERNAME, username);
            builder.put(Constants.FESEN_PASSWORD, password);
        }