If you wish to change your email address, you'll first need to login to your profile.
1. Click on the menu icon on the top right of the page (to the right of your picture), click on Settings, then Account Settings. You'll then click 'change' to the right of Email Address.
2. Under My account settings click change next to Email Address to update this information.
4. Type in the new email address you wish to use. Your current password will need to be entered before the change can be updated. Click update email when you're done. An email will be sent to your new email address confirming this change.