When logged in, click on your profile picture if you have one, or on the button containing the initials of your name if you don't have one. Those widgets are on the navigation bar, at the top right for desktop devices, or on the collapsible sidebar for mobile devices. Then you can access to all options of your account ( teacher profile, student profile, cart, user settings, etc.)
You can learn more about this on our privacy policy - section 3 and 9, and our code of ethics