Imports github.com/juju/usso golang.org/x/net/context gopkg.in/errgo.v1 gopkg.in/httprequest.v1 gopkg.in/juju/environschema.v1 gopkg.in/juju/environschema.v1/form gopkg.in/macaroon-bakery.v2/httpbakery Standard library imports encoding/json io/ioutil net/http net/url os path/filepath