As one of oldest community member with a lots of backlogs…, I couldn’t log-in to my email address.
Myq mentioned about that 1st log-in triggers migration process and I may have to wait.
I went to do something else.
After 6 hours, I requested the password reset, then I was able to log-in!
I think that you may want to add the description that migrating user may want to try twice after a moment.
Good job!