List report of all users w/in my product line and the workspaces under it

We recently went through a reorg and have users that are either no longer with the company, have changed roles/responsibilities, etc. that will need their access/permissions changed which will result in a cost savings for the paid subscriptions.

I'm looking for the ability to create a list view or report of all users w/in my product line and the workspaces under it, in order for us to identify the required permissions by user are up to date or whether they require changes which would result in potential cost savings.