How can add an action in Mixin?

defmodule MishkaCms.Runtime.Resources.Mixins.PagePaperTrailMixin do
  def postgres do
    quote do
      postgres do
        table "page_versions"
        repo MishkaCms.Repo

        references do
          reference :version_source, on_delete: :delete
        end
      end
    end
  end
end

read :get_any do
   get? true
   multitenancy :bypass
end