How to Add Users to Kubernetes (kubectl)?

I've created a Kubernetes cluster on AWS with kops and can successfully administer it via kubectl from my local machine. I can view the current config with kubectl config view as well as directly access the stored state at ~/.kube/config, such as: apiVersion: v1 clusters: - cluster: certificate-authority-data: REDACTED server: https://api.{CLUSTER_NAME} name: {CLUSTER_NAME} contexts: - context: cl