Your login email address is displayed on your User profile page under Info section as follows
Also, it is displayed under Contacts section as your primary email, as follows
To change your login email address please click the Change link under Info section or the Change email link under Contacts section. You will see a dialog to enter your new email address as follows
After you enter your new login email address and press Change email button, a confirmation email will be sent to your current email address.
After you confirm changing your login email from your current email address, a confirmation email will be sent to your new email address.
After you confirm changing your login email from your new email address, it will be changed in the system and you may use it to sign in to your account.
