Hi all 👋 does anyone know how to use custom gcp images with modal work pools: I am configuring the image like so (according to this thread)

work_pools:
    default_modal: 
      name: modal_pool
      work_queue_name: default
      job_variables:
        image:
          tag: 'us-east1-docker.pkg.dev/<gcp-project>/prefect/prefect-flows:{{ $IMAGE_TAG }}'
          secret: 'gcr-secret'

where

gcr-secret

is a secret containing a single environment variable

SERVICE_ACCOUNT_JSON

which we know to work with modal’s from_gcp_artifact_registry. The error we are getting suggests that prefect is trying to do regular registry auth with that secret:

could not fetch task data: Private registry access requires a Modal secret with the environment variables: REGISTRY_USERNAME and REGISTRY_PASSWORD.

I cannot find the relevant prefect code for this. Is there some way to make it use the correct authentication mechanism for gcp registries?