I have gotten locked (a couple of times) out trying to log-in to the site thanks to my password manager filling in the username with my verified email address.
Took me too long to realize I only need enter my username (not email address) and password to get in. What threw me was the log-in form states:
"Display Name or Email Address" in the username field.
Should this maybe just say "Display Name" or is there a problem with the email address not working as alternative for log-in?
...or am I crazy? (don't answer that one 😉