The user putting in the abstracts/users isn't going to know which refer to what so the cmd line would be an odd choice. To keep it simple I left this code in there. It's the easiest assumption, if we have a single user named what the abstract lists we can link them otherwise we can't. This avoids having to check institutions and other data to determine which user is actually the user we want.

We can add more logic, but I think it matters how important having a link to the user is. We shouldn't be depending on it ever because the user could have been added after the abstract anyway.