You can change your email as many times as you want. To do so, just follow these steps:
Step 1:
Sign in to your Table Mesa account.
Step 2:
Click the profile avatar in the upper righthand corner and select 'Account settings'.
Step 3:
Under the 'Basic info' section, click the edit icon and change your email address. Click save and you'll be all set.
Remember, this will now be the email address you log in with as well.