cern: add CERN OAuth endpoint

Change-Id: I7532b49af74ce2ea5edaffba7f61a45f420d329d
Reviewed-on: https://go-review.googlesource.com/114996
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

cern/cern.go

@@ -0,0 +1,16 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package cern provides constants for using OAuth2 to access CERN services.
+package cern // import "golang.org/x/oauth2/cern"
+
+import (
+	"golang.org/x/oauth2"
+)
+
+// Endpoint is CERN's OAuth 2.0 endpoint.
+var Endpoint = oauth2.Endpoint{
+	AuthURL:  "https://oauth.web.cern.ch/OAuth/Authorize",
+	TokenURL: "https://oauth.web.cern.ch/OAuth/Token",
+}