I tried, but I need to create an account, enter my name, a password, my email, wait for the email, click on the activation link, and then wait for a moderator to approve me. This feels like too much effort when I could go to GitHub and upload a file, so I don't think I'll manage it by the time a moderator gets around to approving me.
Thank you for pointing this out! I apologise for the inconvenience and oversight; it is a setting I forgot to update when we launched which has now been fixed.