How to get a value of model field using javascript – odoo

var Users = new openerp.Model('res.users');
Users.query(['name', 'login', 'user_email', 'signature'])
     .filter([['active', '=', true], ['company_id', '=', main_company]])
     .limit(15)
     .all().then(function (users) {
    // do work with users records, you can access only fields said in query
     for(i in users){
         console.log(i.name)
     }
 });