Plugins and Add-ons: Global administration settings.

Hello,

is it possible to extend the "General Settings" under the Administration menu from out of a plugin?

I want to put up OAuth authentication for a plugin. Thus an ILIAS installation needs a global consumer-key and -secret (two strings). Those consumer credentials are then used to provide acces and request tokens on a user basis.

If I can't extend the existing general admin settings, how would you suggest to facialiate such settings only for the admin?

greetings