[Owncloud] OX_User::useBackend

[mlists.owncloud at eideo.de]

Hi,

I'm trying to develop an user-Backend-App for owncloud 4.

As an inspiration I'm looking at the other User-Backend-Apps like
"user_ldap" or "user_pwauth". They use the following line in their
appinfo/app.php

  OC_User::useBackend('BACKEND_NAME');

I have tested this with my own backend, but the backend is only called,
when the "core"-Backend is unsuccessfully. What I want is to inherit the
"core"-User-Backend and only extend some methods with some
functionalities. Is there a way to do this?

--
Best wishes,
Fabian