Click on your profile picture in the upper right corner
Select "Settings"
Scroll down to "Request an Email Change"
Enter your new email address.
Once you submit the request, your email will be updated within the next hour and your user data will be copied over from your old account.
When we updated your email, you will be logged out of your account and will have to request a new password when logging in again (using your new email address).
Alternatively, you can log in via your email as well, requesting a login code.