You can change your Daily Challenge password by managing your MeYou Health account here:
Near the bottom of the page, just enter your current password, as well as the new password you'd like to use, then click "Save".
If you need to reset your password entirely, please visit the password reset form here:
Enter the email address associated with your Daily Challenge account and click the "Send Password Reset" button. Within a minute or two, you'll receive an email with information on how to reset your password; please check your spam/junk folder if this password does not arrive in your inbox.