Sample Kubernetes serviceaccount including GitHub (remember to use Personal Auth Token, not Username/Password if you've got 2FA enabled) and Docker Hub. Used for a kpack demonstration.

serviceaccount-docker-github.yaml

---
apiVersion: v1
kind: Secret
metadata:
  name: dockerhub
  annotations:
    build.pivotal.io/docker: index.docker.io
type: kubernetes.io/basic-auth
stringData:
  username: <username/email>
  password: <password>
---
apiVersion: v1
kind: Secret
metadata:
  name: github
  annotations:
    build.pivotal.io/git: https://github.com
type: kubernetes.io/basic-auth
stringData:
  username: <github personal token>
  password: ""
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: service-account
secrets:
  - name: dockerhub
  - name: github