FB reauthorize when user already has permission? ("old way fb") Ti 3.2.2

Hi, Im developing an iPhone-app with the latest Titanium (3.2.2).

Im using the FB "the old way", which means

var fb              = require('facebook');
        fb.appid            = 100xxxxxxxx;
        fb.permissions      = ['email']; 
        fb.forceDialogAuth  = true;

And what Im trying to do is based on what the user want to do, in this case, send a FB-message, I just want to show that user the fb-reauthorization-popup again. But if the user already has validated I dont want the user to get thrown to the reauthorization again.

I've check the fb.getPermissions(); but it only returns "email" (Since the login authorization).

What Im doing is:

fb.reauthorize(['xmpp_login'], 'me', function(e)
            {
 
            });

But either way, Im getting thrown to the reauthorization process.. Are there any way to prevent this so the user dont have to go through it if the scope is validated already?