@Override
    public ActivityRecordSet<ActivityRecord> getUserHistory()
            throws GuacamoleException {
        return new SimpleActivityRecordSet<ActivityRecord>();
    }
{@inheritDoc}

<p>This implementation simply returns an empty {@link ActivityRecordSet}.
Implementations that wish to expose user login/logout history should
override this function.
guacamole-ext/src/main/java/org/apache/guacamole/net/auth/AbstractUserContext.java