get doorkeeper access_token after facebook authentication

[mgharbik]

Dear folks,
I am using doorkeeper to implement an oauth2 provider for my app. Users can also authenticate through facebook, is there any way to get the doorkeeper access_token from the facebook token?

I found the same issue posted in stackoverflow but actually no answer, if someone could provide us a solution, it will be really appreciated!
http://stackoverflow.com/questions/19241063/authentication-with-doorkeeper-after-facebook-authentication

Thanks in advance,

[przemekciacka]

I would implement another grant type flow, e.g. facebook and then create method to check credentials in facebook.
To make it doorkeeper needs elastic grant type mechanism

[tute]

This PR may solve your issue: #249.

Closing this issue in favor of StackOverflow, as this is not an issue with doorkeeper itself.