code: func (a *AuthWithRoles) GetClusterName(opts ...services.MarshalOption) (services.ClusterName, error) {
  	if err := a.action(defaults.Namespace, services.KindClusterName, services.VerbRead); err != nil {
  		return nil, trace.Wrap(err)
  	}
  	return a.authServer.GetClusterName()
  }
docs: // GetClusterName gets the name of the cluster.