block17.

$ kubectl -n kube-system get secrets | grep tiller
tiller-token-xxxx
$ kubectl get secret tiller-token-xxx -n kube-system -o yaml
apiVersion: v1
data:
  ca.crt: xxx
  namespace: xxx
  token: xxx
kind: Secret
metadata:
  annotations:
    kubernetes.io/service-account.name: tiller
    kubernetes.io/service-account.uid: xxxx-xxxx-xxxx-xxxx
  creationTimestamp: 2018-05-15T14:51:35Z
  name: tiller-token-xxxx
  namespace: kube-system
  resourceVersion: "860311"
  selfLink: /api/v1/namespaces/kube-system/secrets/tiller-token-xxx
  uid: xxxx-xxxx-xxx-xxx
type: kubernetes.io/service-account-token