First, log in with your current credentials.
Then click on "Update my profile" in the menu option "DIRECTORY" .

Click on "Edit your account".

Finally, click on the "Personal Information" tab in the left bar.

In the field Email Address* enter your new email address and click on "SAVE".
In the tab "Email Management" verify if the new email address is well selected for identification and notifications. Otherwise choose it in the list and click again on "SAVE". 

To change your password click on the left rider "Password Management", enter twice your new password as well as once your former password to validate the procedure and click on "SAVE".

You can now log in with your new credentials and receive notifications via the selected email address.