gistfile1.txt

 var sha = crypto.createHash('sha1');
           sha.update((new Date()).toString() + invitedUser.email);
           invitedUser.token = sha.digest('hex');

        User.save(invitedUser, function (err, invitedUser) {
          User.addOrganizations(invitedUser, organizations, function() {
            callback(err, invitedUser);
          });