Add Home Connect (Siemens Dishwasser) to HA

I want to add Home Connect to my HA installation.
I have created a developer account and received this info :slight_smile:

Username for apps : {my emailadres}

Clientid : FB9DCB81ECD3B074C9678435468B735FFE4CC8F6D2E523DF2B9A9A7914C8AA15
Secret : 724B2E01783ADEEC4E0E6DB6EE7DF7128B85C5D7415F9F30B4A2F236B9030C08

(I changed the values in this post for security reasons)

When I add the device Home Connect and enter these values I receive a auth error ( “error”: “unauthorized_client”). Before I tryed to configure the device I logout from the developer website (as mentioned in the manual).

Please help. What am I doing wrong here ?