Support OAuth2 state tokens.

lib/cli/auth-oauth2/index.js

@@ -54,6 +54,11 @@ module.exports.builder = function(yargs) {
     , default: process.env.OAUTH_SCOPE
     , demand: true
     })
+    .option('oauth-state', {
+      describe: 'Whether to enable OAuth 2.0 state token support.'
+    , type: 'boolean'
+    , default: true
+    })
     .option('oauth-domain', {
       describe: 'Optional email domain to allow authentication for.'
     , type: 'string'
@@ -104,6 +109,7 @@ module.exports.handler = function(argv) {
     , clientSecret: argv.oauthClientSecret
     , callbackURL: argv.oauthCallbackUrl
     , scope: argv.oauthScope.split(/\s+/)
+    , state: argv.oauthState
     }
   })
 }