Auth mechanism is likely OAuth 2.0, using this lib should you be interested: https://code.google.com/p/goauth2/source/browse/oauth/oauth.go
OAuth 2.0 has only ever given me nightmares due to lack of any agreed standard way to implement or real wide spread community support.
http://hueniverse.com/2012/07/oauth-2-0-and-the-road-to-hell/
http://player.vimeo.com/video/52882780
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OAuth 2.0 has only ever given me nightmares due to lack of any agreed standard way to implement or real wide spread community support.
http://hueniverse.com/2012/07/oauth-2-0-and-the-road-to-hell/
http://player.vimeo.com/video/52882780