Edit the Category metafields from the graph admin API

[anshumann]

Hi!

I'm trying to edit the category metafields on a product in our store using the Admin API. I understand that these metafields seem a bit special in the context that I cannot currently retrieve them when I fetch the product using the API (presumably because they have the "shopify" namespace?)
Is there a way to retrieve them and edit them directly using an API connection? For context we have an automated tagging system that can generate the taxonomy attributes, but we want to be able to edit these directly from the API.