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).
2. A menu will appear. Choose the Heading that says 'Settings'.
3. 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. Click update email when you're done. An email will be sent to your new email address confirming this change.