I would go for the labels associated with a pod, see the example below.
labels:
app: sas-workload-orchestrator
launcher.sas.com/job-type: compute-server
launcher.sas.com/requested-by-client: sas.studio
launcher.sas.com/username: christine
sas.com/created-by: sas-launcher
sas.com/deployment: sas-viya
swo.sas.com/containerName: sas-programming-environment
swo.sas.com/jobID: '40'
This gives you directly the userid your are after.