From that blog post it seems you only support a handful of OAuth providers which is not what we are asking here.
The currently supported OAuth service providers are Facebook, Twitter, Google, and GitHub. We’ll be adding more OAuth providers in the future.
Is it possible for DF to use our custom authentication server with OAuth?
If not, then how can we authenticate our users and then assign permissions to endpoints and its actions of the DF API?
@DFCommunityManager could you pass these questions to the dev team or at least give me an email to be able to contact them myself?