Oct 17th, 2015
The Drupal User expire module "allows an administrator to define a date on which to expire a specific user account or to define a period at a role level where inactive accounts will be locked."
This is handy when you have someone who only needs access for a short period of time. It is also handy for expiring admin accounts that have been inactive for some period of time. See Locking vendor accounts after their job is over, locking inactive admin accounts at 90 days