log.user.ttl config is not working

[jianhuang1648678534]

I have been trying to use a customized logIdentifier. I can not make the ttl function working.
ex: log.user.ttl config=PT20H
Based on my debugging it is not working because LOG_STORE_TTL is the GLOBAL setting

public static final ConfigOption<Duration> LOG_STORE_TTL = new ConfigOption<Duration>(LOG_NS,"ttl",
            "Sets a TTL on all log entries, meaning " +
                    "that all entries added to this log expire after the configured amount of time. Requires " +
                    "that the log implementation supports TTL.",
            ConfigOption.Type.GLOBAL, Duration.class, sd -> null != sd && !sd.isZero());

so the user log will never have the TTL function.

[jianhuang1648678534]

public KCVSLogManager(KeyColumnValueStoreManager storeManager, final Configuration config,
final int[] readPartitionIds) {
Preconditions.checkArgument(storeManager!=null && config!=null);
if (config.has(LOG_STORE_TTL)) {
indexStoreTTL = ConversionHelper.getTTLSeconds(config.get(LOG_STORE_TTL));

always return false for user log.