> I support this.

Me too. Pre-filling the password should be pretty easy, we have already figured out the hard work when we started passing the email addresses around.

It brings up the question of how to handle the converse case - if the user is on /signin and fills out an email address and password of an unknown user, we show a link to the signup page. Users who click the link are sent to `/signup` and the email address is pre-filled. Should we give the same love to the password here too?