Monitor URL and Validate if Login Successful?

Hey Splunkers, I am montoring URL connectivity in splunk, monitoring as in the response_code of the URLs. With that, i want to also check, when the URL s up, user enter the credentials, then the Login is successful or not? Because many a times, it happens, the URL is up, we are getting 200 response code, but after entering the credentials the URL gets stuck or some error, as in is it possible to validate the URL after login? Keep Splunking, TIA