Yahoo BOSS and OAuth

Question

I want to use yahoo search ( or Yahoo BOSS ) , it requires OAuth2 authentication

I created yahoo project, and enabled billing and took the 2 keys (secret key and client id key)

the problem is :

1- how to use OAuth with localhost, or from console application

2- how to authenticate without user intervention, I want the whole process to be automated

I searched a lot , and read many articles , but no results

yahoo documentation is ambiguous  between OAuth 1 and OAuth 2

Please I need Help

thanks