Unable to connect Dataform to Google Cloud Source Repository

Question

I tried the following example usage to create Dataform resources with terraform provided in documentation:

resource "google_sourcerepo_repository" "git_repository" {
  provider = google-beta
  name = "my/repository"
}

resource "google_secret_manager_secret" "secret" {
  provider = google-beta
  secret_id = "secret"

  replication {
    automatic = true
  }
}

resource "google_secret_manager_secret_version" "secret_version" {
  provider = google-beta
  secret = google_secret_manager_secret.secret.id

  secret_data = "secret-data"
}

resource "google_dataform_repository" "dataform_respository" {
  provider = google-beta
  name = "dataform_repository"

  git_remote_settings {
      url = google_sourcerepo_repository.git_repository.url
      default_branch = "main"
      authentication_token_secret_version = google_secret_manager_secret_version.secret_version.id
  }

  workspace_compilation_overrides {
    default_database = "database"
    schema_suffix = "_suffix"
    table_prefix = "prefix_"
  }
}

It seems that Google Cloud Source Repositories doesn't work with this implementation due to its lack of token generation. How can I connect my Google Cloud Source Repository to a newly created Dataform Repository? Is Github\Gitlab\Bitbucket mandatory in order to link git with dataform? Do you have any alternative solutions to solve this issue?

Regards,