Sorry If I didnt see it somewhere in the docs, but do you have somewhere a minimalst auth provider example/template one could use as basis to extend?
The section "Creating an authorization plugin" talks something about a hook, but the other auth provider plugins (for 7.0) I looked through, do not use it, but extend some class?
Unless I'm completely overlooking something, could you please provide a dummy provider that say just hardcoded authorizes the user "bob" with the password "foobar"? (and thats the place I'd put my backend in)