helm-external-secrets/docs/snippets/gcpsm-wif-iam-secret-store.yaml

apiVersion: external-secrets.io/v1
kind: SecretStore
metadata:
  name: demo-store
  namespace: demo
spec:
  provider:
    gcpsm:
      projectID: [PROJECT_ID]
      auth:
        workloadIdentity:
          serviceAccountRef:
            name: demo-secrets-sa