Hello
I'm trying to use a Chat-Enabled Notebook with the Chatbook Paclet. I have to change my OpenAI API key to a new one, but I can't get it to work.
I can delete SystemCredential["OPEN_API_KEY"] after which I should be asked about my API key I thought at least and I can even set it to the right value, but it uses the wrong key "sk-i...unO1" whatever I set in SystemCredential["OPEN_API_KEY"]. How can I change the API key Chatbook is using?

The OpenAI API has some credit balance, so I don't think it has something to do with OpenAI. I use the Wolfram Cloud if this is relevant.
Anyone some ideas?
Many Thanks!