Ah! So that was the service where I was able to continue logging in by selecting Deny/Cancel! I believe in AirTable you can get around this. Not on Dropbox.

OP here. Just to clarify some confusion. I can still login using my username and password. I just liked the simplicity of logging in via Google, since I was already logged in there.

Seems like I'm no longer able to do that and, from what I read here, some users might be completely locked out unless they give access to Google contacts.

I stopped using Google login a while back after having a hard time moving an account to a different google account. I realized that the benefits do not outweigh the problems AND that I really didn't want Google being the gatekeeper to all these other accounts. It's also what has started me on the path of moving off of all Google products. I still like Google, but the honeymoon is certainly over.