This seems really easy to do because Activity Stream can filter by Username:

Then you discover that you have no idea what you username actually is because of the way Atlassian has "said goodbye to usernames". Searching around and trying stuff out I have failed to be able to create this trivial activity stream. I've tried using my long UID, but that doesn't work. I've tried my email address, but that doesn't work. I've tried the display name for (at) references, and that doesn't work.
Everything results in "No activity was found".
How am I supposed to create this obvious and simple Activity Stream?