Please consider adding a method to track were credentials are being used in Jobs and in Tasks. This would help with identifying all areas that may need to be changed if:
1) a user may leave or credentials for given jobs may need to be changed to a different user.
2) an audit is run and a system admin may need to run a report to show all jobs/tasks running under a given credentialed user.
3) errors start showing for a credentialed user and you need to identify which job/task that user is assigned to to make changes to the job/task.

This would have many benefits if it could be added to the Object search or Audit log to report as mentioned.