ClickBank clients can change their email username from inside their primary account.
​Related: How do ClickBank accounts work?

Step 1: Log in to your ClickBank account.

Step 2: Click your name in the right corner. Then click My Profile.

Step 3: Click Change Email Address.

Step 4: Enter and confirm your new email address. Click Save.

Step 5: You will receive a confirmation email in the inbox associated with that email. Click the link to confirm your email address change.

Step 6: Log in with your updated email address.