How to store events in the ES right?

[SMMMN]

Hi I use your repository to store events in the ES. My question: I thought that the events in the ES should look like '0@user-user100'. But when I save the event in the ES it looks like '0@user'. How can I make sure that the userId is part of the stream so that I have all events for one user in one stream?

I think it has something to do with the Publish() method?