当response为401时，如何设置Kubernetes Ingress auth-url的CORS？

nginx.ingress.kubernetes.io/auth-url: <auth-url>
nginx.ingress.kubernetes.io/auth-response-headers: "Authorization"
nginx.ingress.kubernetes.io/configuration-snippet: |
  if ($request_method = 'OPTIONS') {
    add_header 'Access-Control-Allow-Origin' '$http_origin' always;
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
    add_header 'Access-Control-Allow-Headers' 'Authorization' always;
    add_header 'Access-Control-Allow-Credentials' 'true' always;
    add_header 'Access-Control-Max-Age' 1728000 always;
    add_header 'Content-Type' 'text/plain charset=UTF-8' always;
    add_header 'Content-Length' 0 always;
    return 204;
  }
  add_header 'Access-Control-Allow-Origin' '$http_origin' always;
  add_header 'Access-Control-Allow-Credentials' 'true' always;