Inside the NorthStack Console, there are two different parts that make up an account: organizations and users. When you log into your account, you're logging in as a user who is part of a larger organization.
When logged into the NorthStack Console, you'll notice your name with an icon at the top-right of the page. Click on your user icon, then on User Settings to access the settings for your user.
You'll now be on the User Settings page. From here, you can make changes to your account such as changing your email, enabling two-factor authentication, or changing your password.