So it's time to remove your default kubeadmin account. For ease of use lets use htpasswd
Generate a htpasswd file for a few users
cd
touch htpasswd
htpasswd -Bb htpasswd andrew openshift
htpasswd -Bb htpasswd david openshift
htpasswd -Bb htpasswd karla openshift
oc create secret generic htpasswd --from-file=htpasswd -n openshift-config
oc apply -f - <<EOF
apiVersion: config.openshift.io/v1
kind: OAuth
metadata:
name: cluster
spec:
identityProviders:
- name: Local Password
mappingMethod: claim
type: HTPasswd
htpasswd:
fileData:
name: htpasswd
EOF
Yes you should!
oc delete secret kubeadmin -n kube-system