app.use('/*', function(req, res, next) {
    if (req.subdomains.length >= 1) {
        myDB.User.find({where: { subdomain: req.subdomains[0] }}).success(function(result) {
            req.user = result; // assuming we found one, you get the idea
            next();
        });
    } else {
        next(); // we don't have a user object, no need to attach it
    }
});