title: database synchronization issue in multiple zencart site
body: <p>I have 2 zencart site running and 3rd one is about to be live. I want each <strong>user registration</strong> and <strong>coupon</strong> will be available across those 3 sites. Actually I want user registration globally so user can access any site among these 3 with same login info. And update specific coupon info of any user if any changes has been made by him. Is it possible? pls share any idea you have. Thanks  </p>