var db = new mysql.Database({
    hostname: 'localhost',
    ....etc...
});
db.on('error', function(error) {
    console.log('ERROR: ' + error);
}).on('ready', function(server) {
    console.log('Connected to ' + server.hostname + ' (' + server.version + ')');
}).connect(_dbConnected());

function _dbConnected(){
    db.query("SELECT ta.ukey, tu.login, tu.accid, tu.id, tu.buddyicon, tu.private FROM "+ACCOUNTS_TABLE+" as ta JOIN "+USERS_TABLE+" as tu ON tu.accid=ta.accid").
        execute(function(error, rows, cols) {
            if( error ){
                console.log('ERROR: ' + error);
                return;
            }
            _.each(rows, function(row){
                new User(row);
            });
            _usersLoaded();
        });
}