Unable to connect to the server: tls: failed to verify certificate: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "kubernetes")

 -node reset후에 인증서 관련 문제 발생 
-> 아래의 명령어를 입력하여 새로 생성 
rm -rf ~/.kube
mkdir -p ~/.kube
sudo cp /etc/kubernetes/admin.conf ~/.kube/config
sudo chown $(id -u):$(id -g) ~/.kube/config