To change the login email address that is associated with your account, follow these steps:
Go to Account Settings by clicking the account icon in the top right corner
In the 'Login Email' section, click 'Change email.'
Enter the new email address where you would like the authentication login email to be sent and click save.
A confirmation message saying your email has been saved will be shown.
The next time you login enter the updated email address. The authentication code will be sent to the new email.