This should be the same email address you used for your iiod.io account. Ensure that it's free of typos and spelling mistakes.
If the email address you entered is correct, check your email for the 6-digit verification code to enter above. Didn't receive anything? Wait a few minutes and check your spam or junk folder. You can also get a new code (but keep in mind this can only be done 3 times every 24 hours).
Passwords must be at least five characters, contain one digit and one other character.
Once you change your password, you will be logged out and required to log back in with your new password on all your devices.