Finding Inactive users On SAS Linux

[wish]

We are Gathering information for resizing our SAS Grid environment.

1st thing i need to know is how many active users and inactivity users. How do i know users who are not using SAS but still have access to SAS. We want to remove them.
Any program or help is useful.

[SASKiwi]

One way to identify these would be to get the last time SAS users login. This post may help: https://communities.sas.com/t5/Administration-and-Deployment/Get-last-SAS-logins-of-users/m-p/852248