How to handle popups to record activity

I am using Selenium IDE to create scripts that are used for New Relic Synthetics, for the cases where the applications asks us to enter credentials in a popup box (as attached) instead of html page, I could see that it is not getting recorded in the Selenium IDE.
Did anyone face this case & any solution available?

Hello, @nagendrakunduri: New Relic does not support Selenium IDE. You might try asking your question in one of the Selenium IDE help venues: