Yes, the application is shared within a group.
There is no error message.
The application is registered in ArcGIS Online, with an AppId.
I use that AppId within the oAuthInfo object.
var info = new OAuthInfo({
appId: myAppId,
popup: false
});
The problem is anyone with an ArcGIS Online account can sign in. How do I limit it to only members of the Application group?