Bose SoundTouch Binding - Developer portal switched off

Hello,
I have an Bose SA-5 which I had previously successfully connected to openhab via the Bose Soundtouch Binding. I am resetting it up on a different openhab installation now and apparently didn’t make note of the authorization key, which needs to be requested from developer portal.

The Developer portal has, however, been shut down. Is there any advise, on how to get access to such a new authorization key?

Many thanks

Do you have any backups of files from the old installation? The authorization key is likely in the definition for the bridge Thing which you can find in the JSONDB.