I'd like to log in with my registered email address and be able to change my username. And a long shot: Because I can't change my username, I've got a few acco

I'd like to log in with my registered email address and be able to change my username. And a long shot: Because I can't change my username, I've got a few accounts here under the same email address - I'd like to be able to merge those accounts to preserve my saved posts and points.