State of the Ext.io.User authentication

What is the state of the Ext.io.User authentication?

I just created a new app with a user group and login: "In the app".
Opening up my-user-group.login.senchafy.com/login just shows "Invalid realm" (Not sure if it is supposed to be opened in the browser that way.)
Also, in the admin it says Authentication: "Disabled"

I remember it didn't work at the SenchaCon yet, that's also why I'm asking,
Thanks

Hello Steffen,

You are correct "In-The-App User Authentication" is not supported yet. We intend to support this in the next release of the Sencha.io SDK.

John