Pass `grant_date` to `access_token` callback?

[yhahn]

Thanks for your work on this!

Small thing -- it looks like the grant_date has been encoded in the access_token so that implementers can expire or deny use of a given access token according to their needs. However, the grant_date is being parsed but not passed to the access_token callback here:

https://github.com/ammmir/node-oauth2-provider/blob/master/index.js#L53

I'm guessing this was just overlooked and needs a quick fix, but is there some other reason for withholding this from the callback?

[ammmir]

thanks for catching this omission!

to avoid breaking existing deployed code, i'll create a branch for v1 that you can track (i won't push it to npm for a while, though).

[yhahn]

Great, thank you.