fix xoauth/xoauth2

lib/imap.js

@@ -46,7 +46,8 @@ function ImapConnection(options) {
     port: options.port || 143,
     secure: options.secure || false,
     connTimeout: options.connTimeout || 10000, // connection timeout in msecs
-    debug: false
+    xoauth: options.xoauth,
+    xoauth2: options.xoauth2
   };
 
   this._state = {
@@ -1346,11 +1347,10 @@ ImapConnection.prototype._login = function(cb) {
     if (this._serverSupports('LOGINDISABLED'))
       return cb(new Error('Logging in is disabled on this server'));
 
-    if (this._serverSupports('AUTH=XOAUTH') && 'xoauth' in this._options) {
+    if (this._serverSupports('AUTH=XOAUTH') && this._options.xoauth) {
       this._send('AUTHENTICATE XOAUTH ' + utils.escape(this._options.xoauth),
                  fnReturn);
-    } else if (this._serverSupports('AUTH=XOAUTH2')
-               && 'xoauth2' in this._options) {
+    } else if (this._serverSupports('AUTH=XOAUTH2') && this._options.xoauth2) {
       this._send('AUTHENTICATE XOAUTH2 ' + utils.escape(this._options.xoauth2),
                  fnReturn);
     } else if (this._options.username !== undefined