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Thanks for the contribution. I've restored the checklist that you removed from the PR template; it's there because those steps are important, and you've skipped many of them, including critical ones.

I'll mark this as a draft for now; once you've worked through the checklist and addressed the items there, please remove the draft designation and we can triage it for review.

It was my hope that someone at Google would pick it up and fix it, as it is a pretty big issue. Currently not possible to do server-side authentication with Google sign-in, something that I can imagine is a common use case with Flutter. I'll see if I have time to make a new pull request that ticks off the list.

@stuartmorgan closing this as I submitted a new pull request here: #4070