You can update your email associated with your Quizizz account provided there is no account associated with the new email. To know how to go about this, kindly follow the steps below.
Step 1: Click on the Menu button on the top left corner.
Step 2: Select Settings from the left menu.
Step 3: Here you can update the email and click on "Save Changes" to save the new email address.
Step 4: After your email is updated successfully, you will be logged out. Just log in again and go back to the "Settings" page to verify that the change was made.