Obtaining the user who originated the change event in Vaadin Collaboration Kit when subscribing to changes in a NamedMap within a Topic

I am using Vaadin Collaboration Kit and have subscribed to changes in a NamedMap within a Topic in Vaadin Collaboration Engine. I would like to obtain the user who originated the change event when updates occur in the map.

Here is the code I am using to subscribe to changes in the NamedMap:

CollaborationEngine.getInstance().openTopicConnection(this, "topic",
        localUser, topicConnection -> {
            CollaborationMap formManagerCollaborationMap = topicConnection.getNamedMap("mapvalues");
            formManagerCollaborationMap.subscribe(event -> {
   // How can I obtain the user who originated the change event?
    // I want to access the user who made the change in the map
    // ...
            });
            return null;
        }
);

How can I retrieve the user ID who originated the change event? Is there any specific method or property to access this information?

I have tried to use the event, but is of type MapChangeEvent which only has the attributes key:String, oldValue:JsonNode, value:JsonNode. I couldn't find the user information associated with the event

Any help would be greatly appreciated. Thank you!

Collaboration Kit does not track that information. If you need to know it, then you can embed it in the value that you store in the map itself.