Register your website as an application on the <a href="http://login.amazon.com/manageApps" trget="_blank">Login with Amazon App Console</a>. For more information, see the <a href="https://images-na.ssl-images-amazon.com/images/G/01/lwa/dev/docs/website-gsg._TTH_.pdf" target="_blank">Login with Amazon Getting Started Guide</a>. A client identifier (Client ID) is set when you register your website. You will need this identifier for your integration.