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 historyhub@nara.gov from the email address registered with History Hub. Someone can take care of that for you.
Step 1: Make sure you're signed in to History Hub with your user account.
Step 2:Click on your avatar and scroll down to "Settings":
From here, you can select change your password and email address, as well as your subscriptions and notifications. Make sure you save your changes before leaving the page.