Two of the first questions typically asked when you are experiencing a secret leak are:
"Is the credential still valid?" and
"Has the secret been removed from the git repo?"

GitGuardian makes it simple to understand the state of your leaked secrets with our automatic validity and presence checks.

Read more about this feature here:
https://docs.gitguardian.com/internal-repositories-monitoring/remediate/investigate-incidents#validity-and-presence-checks