Pulumi operator does not support GitHub deploy_keys? (trying to workaround lack of GitHub apps support)

gitAuth: 
    sshAuth:
      sshPrivateKey:
        type: Secret
        secret:
          name: pulumi-github-private-key
          key: ssh-privatekey

controller-manager spits this error:

"reason":"SourceUnavailable","message":"listing: invalid auth method"

From Git's and SSH's perspective, a GitHub deploy key is a regular SSH key that allows you to connect to

git@github.com:my-org/my-repo.git

Yea, but operator cannot connect using

<mailto:git@github.com|git@github.com>

, it does not have any valid known_hosts file. As for

sshPrivateKey

it's wrong. https://github.com/pulumi/pulumi-kubernetes-operator/blob/master/docs/stacks.md#stackspecgitauth

unknown field "spec.gitAuth.sshPrivateKey"