You can easily change your email address, name, or other elements of your profile, as well as your privacy settings or password. For security reasons, you are not able to change your History Hub username yourself. However, if you'd like to change your username, please email firstname.lastname@example.org from the email address registered with History Hub. Someone can take care of that for you.
How to change your settings
Step 1: Login to History Hub.
Step 2: Click on the arrow next to your picture in the upper right corner of the page.
From here, you can select Edit Profile, Preferences, or Change Password. Make sure you save your changes before leaving the page.