To track the user login activity please follow below given steps.
Go to Admin Panel -> Track
Click on Track Users Login Record
Now you can see the track record of the user login activity.
Other add-ons of interest
Analytic Reporting Tool Basic
Dynamic Reports and Interactive Charts.
Powerful tool for SuiteCRM report creation and data analytics. Includes a variety of chart types, detailed, summary and pivot tables. This Reporting Tool is for anyone, no need for technical knowledge or SQL. Comes with over a hundred prebuilt reports.
Monitor user activities such as when a record gets added, updated, or deleted. Also see when users log in and out of the CRM.