Google oauth with cakephp3 and UseMuffin/OAuth2 plugin

I want to use google oauth with cakephp3 and UseMuffin/OAuth2 plugin but i dont get it running…
i followed all the instructions on the plugin website: https://github.com/UseMuffin/OAuth2

does anybody have a example code how to get it running?

You can try out https://github.com/ADmad/CakePHP-HybridAuth