Get user subscription level from API

I have access to a Zoom account via oauth in my integration but as some features are not available on the free plan (for example adding a registrant to a meeting), I need to code the integration differently depending on the Zoom plan. Doing an API call to get an error is a bit awkward way of achieving this. It would be better if I could retrieve the Zoom plan and act accordingly. This seems only to be possible using the “Get Account Billing Plan API” which is only available for master accounts.

Related issue: Getting info about Zoom plan - #6 by MaxM