Your display name shows on your dashboard and certificates. 1-80 characters.
Your handle appears on the public leaderboard. Lowercase letters, numbers, underscores only. 3-20 characters. Once changed, you can't change again for 30 days.
We'll send a confirmation link to the NEW email address. Click it within 30 minutes to complete the change. All other devices will be signed out for security.
This wipes your DHU profile (display name, handle, email association) and revokes every sign-in session. Your historical leaderboard rank stays as [deleted user] for integrity. You'll need to create a new account if you ever want to come back.
This cannot be undone.