- We want to see if there is any API we could leverage to get the last login time stamp as the user logs in. We want to retrieve these details real time as the user logins in so we can consume it for one of our integration
In order to get something real time you are going to need to be able to subscribe to a system webhook which I believe is difficult to get system wide. Most of the webhook functionality is a per place setup. But if you could get a webhook to notify you then as Devinder said the People service has the data element you need.
I think you should look into the Jive Data export Service which is already recording this data. That would not be live as it happens but it would give all the login information you require.