Pass the Realm App ID for your App, which you can find in the Realm UI.
To set up your App client, pass a configuration object to an instance
id is a required field of the application configuration object. To see the full list of fields for the configuration object that
Realm.App accepts as a parameter, view the App Configuration Type Definitions.
To retrieve an instance of the App Client from anywhere in your application, call Realm.App.getApp() and pass in your