When you login to the Force portal, you will see your username in the top right corner of the screen. Clicking on your username will give you access to your user profile. The user profile screen will allow you to update your email address, view what type of emails you have enabled, set up two-factor authentication, or sign up for SMS messaging (SMS messaging only applies if you have a ThreatSweep and want to be notified in this method about Hot Alerts).
Your user profile screen is also the place to change your password and subscribe to various emailed reports.
When finished with the FORCE portal, click on your username to access the logout button.