Is there an API endpoint to set the authorization header used by RevenueCat for webhook integration?

First: thanks for making this great product. I’m new to RevenueCat but so far loving it!

Intro: RevenueCat offers the possibility to register a webhook endpoint, that is called when an event takes place. There is the possibility to manually set an optional authorization header, that will be used by RevenueCat to authenticate when calling the webhook endpoint. 

Question: is it possible to set this authorization header by calling an API endpoint (instead of doing it manually in the configuration section ‘Integrations’ > ‘Webhooks’)?