No, you don’t need to. You can use any email address.
Related Articles
Do users of the Form or Portal need a miniExtensions or Airtable account?
I signed up with Google Sign in. How to change my login to use a username/password instead?
How to change the email address used to log in to my account?
Error "The email address is already in use by another account."
Does changing the email address of my Airtable account lead to complications with my extensions?