About Retrieving Job Execution Users for Orchestrator

Hi All.
When I run the automation jobs from Orchestrator, I want to get the execution user name for Orchestrator.
Can you tell me if there is any other way to get it via API or activity etc, other than passing the execution user name as input to the job?

Many thanks in advance.

The Audit page in Orchestrator provides you with the infomration when and who started a job in Orchestrator.