Cannot create service account in Kubernetes v1.25.5

Blog you are following is from June 5, 2021 might be using the old k8s release, while in 2022-12-08 1.24 relased and you are using the 1.25

In 1.24 Kubernetes release there is change which don’t auto crate the secret when you are creating the ServiceAccount.

Steps to follow

If you want to create the secret you can create it with

kubectl create sa <Service account name>

Create a YAML file with below and update the name and Service Account name

apiVersion: v1
kind: Secret
type: kubernetes.io/service-account-token
metadata:
  name: token-secret
  annotations:
    kubernetes.io/service-account.name: "<Service Account name>"

kubectl apply -f <File created above>.yaml

Extra option

You can also use the kubectl in case just want to create the Token

kubectl create token jwt-tk --duration=999999h

Few ref

Release note & Pull request