http://www.site.com/community/invite/handle-find-friend?core=OAuth2&provider=Google&source_id=1
http://www.site.com/community/invite/handle-find-friend?core=OAuth2&provider=Facebook&source_id=1
http://www.site.com/community/invite/handle-find-friend?core=OAuth2&provider=Linkedin&source_id=1