Before you set up the kubeconfig file later in the tutorial, you must have already done the following (if you haven't, or you're not sure, see the Setting Up Cluster Access topic in the Container Engine for Kubernetes documentation):
* generated an API signing key pair
* added the public key value of the API signing key pair to the User Settings for your username
* installed and configured the Oracle Cloud Infrastructure CLI (version 2.6.4 or later)
https://www.oracle.com/webfolder/technetwork/tutorials/obe/oci/oke-full/index.html