Ok Katya. So, don ́t have a database api like this DatabaseUser.getUser(DB_id, user._id, user.sessionToken) on server code?

Thanks,

Excuse me, my English is so bad that neither google saves. I'll rephrase the question. I get to work with some of the local database and synchronize this with the database of the cloud. When I am local can perform user validation. I know that the first time will have to be connected, but not after. ...