I can’t think of a way to do what you have described, but in my opinion (and with all due respect), it shouldn’t be possible to do what you have described.

If I understand your response correctly, you are trusting another person enough to give them full access to your users’ accounts and their data, but you don’t trust the same person with access to your Bubble account? I’m sure you have your reasons (and I am not one to question them), but I don’t understand that one at all, and I wouldn’t go that route even if it was possible.

Anyway, just my two cents.

Best…
Mike