OH3 behind a Traefik Ingress with basic auth

Setup, Configuration and Use Installation
#1

I already saw a thread here with the configuration for nginx. And saw that in the documentation of OH3.
Could anyone point me to how to configure the traefik kubernetes ingress in a k3s cluster?

I tried that:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: openhab3
  annotations:
    kubernetes.io/ingress.class: traefik
    traefik.ingress.kubernetes.io/auth-type: "basic"
    traefik.ingress.kubernetes.io/auth-secret: "dirk"
    traefik.ingress.kubernetes.io/auth-response-headers: authorization
    traefik.ingress.kubernetes.io/custom-response-headers: |
      Set-Cookie: X-OPENHAB-AUTH-HEADER=1
      Access-Control-Allow-Origin: * always
      Access-Control-Allow-Headers: Authorization,Accept,Origin,DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range$
      Access-Control-Allow_Credentials: 'true' always
      Access-Control-Allow-Methods: POST, GET, HEAD, OPTIONS, PUT, DELETE

But looks like I have a typo somewhere or missed something?