Username Not Available when signing up twice, first incompletely

[codinghorror (Jeff Atwood)]

@itsbhanusharma

I can probably confirm what happens! … After the period you’ve stated in : purge_unactivated_users_grace_period_days
the username should become available again.

Yes, this is as designed, and the above is true. The default for that setting is 14 days though.

Your workaround is simply to complete the login via GitHub.