401 unauthorized for Node-exporter servicemonitor

[subhranil05]

We are using TLS in our node-exporter.
As authentication we are using tlsConfig in servicemonitors and bearTokenFile as below
still getting 401 unauthorized in dashboard, Please help me to find a solution, thanks
spec:
endpoints:

• bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
  interval: 15s
  port: https
  scheme: https
  tlsConfig:
  insecureSkipVerify: true