Expose Hubspot user details for a Send a webhook workflow action

I need to be able to pull through the names and email addresses of HubSpot users named on an object, so that they can be pushed out to a webhook.

In the workflow I am designing a webhook connects to outlook (via powerflow) and issues an email to a 3rd party. I would simply like to cc in the record owner (that triggered the request by creating a record in my custom object).

I suspect this is possible because in the workflow action ‘Send internal email notification’ under the usual object tokens there headings under ‘Related data’, and here the exact tokens I need are helpfully available. But this is not true for the webhook action.

This seems like an easy fix.

PS I don’t want to use internal notifications or the external Hubspot email actions. I also know that the fields can be exposed via custom code to the API but that is long-winded given that the tokens I need can be accessed via an existing workflow action. Hopefully it shouldn’t be that difficult to expose them to another action.