Changing Your Login Email
You can update your login email from your Personal tab, under Account. After changing your login credentials, you'll be logged out and need to log in again to verify them.
1) Open the Settings Dropdown and click Account.
2) Select Personal from the tabs in the context bar to open your personal account page. The 'Login Credentials' will be the first section you'll see. Enter the email (and password) you wish to change in these fields.
3) Click Save Changes before leaving the page to save your work. Log in with your new credentials to complete the process.