When I try get the oauth2 package the console return this for me:
$ go get github.com/martini-contrib/oauth2
# github.com/martini-contrib/oauth2
../../go/src/src/github.com/martini-contrib/oauth2/oauth2.go:181: not enough arguments in call to c.AuthCodeURL
When I try get the oauth2 package the console return this for me: