[brown9-2]

You don’t really have to speculate, they disclosed yesterday that yesterday’s issue had to do with the automated quota system deciding the auth system had zero quota:

https://status.cloud.google.com/incident/zall/20013#20013003

[max_streese]

Thanks for providing this. It's funny to read the speculations when you have read the actual root cause :D

Well I guess the thing is left unanswered for now is why the quota management reduced the capacity for Google's IMS in the first place.

Maybe we will know someday :)