GCP Admin with scheduled cloud functions expertise

Im looking for someone who's got expertise with scheduled cloud functions and other GCP concepts,

I have created a could function and deployed but that's not running, resulting unauthenticated error

{"@type":"type.googleapis.com/google.cloud.scheduler.logging.AttemptFinished", "jobName":"projects/ABCDEF/locations/europe-west1/jobs/firebase-schedule-runAutomationTests-europe-west3", "pubsubTopic":"projects/ABCDEF/topics/firebase-schedule-runAutomationTests-europe-west3", "status":"UNAUTHENTICATED", "targetType":"PUB_SUB"}


please post your bids only if you know the solution, and if you can solve this, we have other GCP/Firebase hosting related minor jobs coming next.