"DockerConfigJson": base64.StdEncoding.EncodeToString(
			[]byte(createDockerCredential(registryUser, registryPasswd, registry.Address()))),
	}
	if err := ctx.ConfigIstio().EvalFile(apps.Namespace.Name(), args, "testdata/registry-secret.yaml").
		Apply(apply.CleanupConditionally); err != nil {
		return err
	}
	return nil
}

func createDockerCredential(user, passwd, registry string) string {
	credentials := `{
	"auths":{