Automatically add user to Group when added to user database

Hi all,

We have a team account and keep track of our users (licensed and non-licensed) through the Smartsheet user database.

We also have a group called "All Smartsheet Users."  We use this group to share sheets that everyone needs to see as well as send emails to all Smartsheet users.

Is there a way to automate adding a new user to the Group once the new user has accepted the invitation to Smartsheet and created an account?

I receive an email when the person creates their account, so I can manually add the person to the group, but if I get distracted or the email gets buried under a hundred others, I sometimes forget to add the person.  If there were a way to add that person automatically, life would be better :-)

Thanks much for any ideas.

susan