title: How to delete a AWS Cognito user automatically after certain time
body: <p>I would like to delete a non-verified user from the AWS Cognito user pool after a certain time. Is it possible to delete a Cognito user automatically?</p>
  <p>Let's say, a user signs up from a client app with an anonymous email that might belong to someone else. If the email is not verified, I like to delete it automatically after a certain time. That way it will allow the actual owner of the email to sign up. How can I do that?</p>