when you has a default kubeconfig ,using kubectl auth can-i --list --token still get the kubeconfig privielge

[INT2ECALL]

What would you like to be added:
if you are using command like this

kubectl --server=https://192.168.26.65:6443 --insecure-skip-tls-verify --token=$TOKEN auth can-i --list

and you have a default kubeconfig in admin.conf,kubectl also will use the kubeconfig certdata but not use the token，i think if you use --token that mean you want to get is what the token priviege is not the kubeconfig

Why is this needed:
easy and fast to know the what the sa can do

[k8s-ci-robot]

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[INT2ECALL]

what i am doing is do some fix in ToRESTConfig function in clientset.go

	if len(clientConfig.BearerToken) > 0 {
		clientConfig.TLSClientConfig.CAData = nil
		clientConfig.TLSClientConfig.KeyData = nil
	}

func (f *MatchVersionFlags) ToRESTConfig() (*rest.Config, error) {
if err := f.checkMatchingServerVersion(); err != nil {
return nil, err
}
clientConfig, err := f.Delegate.ToRESTConfig()

if len(clientConfig.BearerToken) > 0 {
	clientConfig.TLSClientConfig.CAData = nil
	clientConfig.TLSClientConfig.KeyData = nil
}

if err != nil {
	return nil, err
}
// TODO we should not have to do this.  It smacks of something going wrong.
setKubernetesDefaults(clientConfig)
return clientConfig, nil

}