If you changed your employer, and your account is connected to an email from your previous job, you will need to first update it.
If you know your password, login using your previous email and update your email address in your user profile. Instructions on how to update your email address can be found in this article: How do I update my profile?
If you no longer remember your password, please email AHA at firstname.lastname@example.org or call 800-424-4301 between 8AM-5PM CT, Monday through Friday. Please provide your full name, previous email address, and new email address.