Using refresh tokens for google login

[weblack]

I've tried to make heads or tails of the google authorization with little success. I was hoping it would be possible to access a google account using a refresh token provided by google, similar to what PokéAdvisor does. This could provide access without providing the e-mails account username and password. I've personally have had issues because my google account isn't @gmail.com and can't be authorized via the normal google login API.

The token is provided from this url

The java api use this method. I don't have the knowledge to get this working.