Email can be changed once every 30 days.
To change your email:
Go to your account settings page and click "Edit".
An email will be sent to your current email address to verify that you initiated the email change request.
After verification, a link to change your email will be sent to the new email address.
After confirming the email change, you will be logged out.
Email can only be changed if you are using the email/password login flow.