Google Account canceled. How do I sign in to my Zoom Pro account now?

Hey Everyone, 

I canceled my google workspace subscription and the integrated, personalized email addresses. I did that, cause I moved to another host. My problem ist, that my Zoom Pro account now is connected to the Google Account and I cannot sign in anymore. Any Suggestions how I change that? It is frustrating that the only way so far is, to log in and change your email address. But I cannot log in. 
Any suggestion is welcome and appreciated.