I want to use [Bakery](https://www.drupal.org/project/bakery) module to login and synchronizing users. But i am not able to sync existing users, i find a [article](http://drupal.stackexchange.com/questions/66424/bakery-users-that-exist-only-on-slave-cannot-login) which confirms Bakery doesn't provide pre-sync facility.

May be someone help me to synchronize existing users account.
(Possibly on db level ie :  drush-rsync or sql-sync )