How to check if the Login by vUser worked?


I have created a simple script of Login using userid and password. I have parameterized and ran it with 42 Vusers. The test ran fine and all the transactions were passed.

My question is, how do I know if each VUser actually logged in and logged out as recorded in the script. Is there any way to prove that each vuser actually logged in and out of the application, hence the response time that is received is correct?