kubectl is the main tool to interact with Kubernetes cluster. It connects to http://localhost:8080 with no auth by default. But how can we use kubectl with auth?
Pretty simple, just config kubectl with dedicated cluster:
kubectl config set-credentials default --username=username --password=password
kubectl config set-cluster default --server=https://kubernetes-master:6443 --insecure-skip-tls-verify=true
kubectl config set-context default --cluster=default --user=default
kubectl config use-context default