Your list of team members shows everyone who currently has access to this account in X Pro, including those who have historically been given the password, as well as those who have been added as Contributors or Admins.
If there is a person showing in the list who should not have access, click Change role next to the person and select Remove from team. This will revoke access for that person in X Pro. For extra security, change your password and review which apps are authorized to access your account at x.com/settings/applications.