It is with great excitement I see the activity here (been watching since @jennybc pinged me about its prototype a while back), I hope to move all auth things of googleAuthR to depend on this package for its next major version, for which it is well due. Hopefully it will also mean more cross compatibility between all the Google API packages out there.

Is multi-user Shiny authentication on the road map for this package? That was pretty much the reason I went down the rabbit hole of googleAuthR, as it was a tougher nut to crack due to the token needing to be a Shiny reactive object, which meant keeping the token in a global of the package didn't work. I got around that at the time with a with_shiny wrapper function that added an argument to each API call function with the token explicitly supplied, but there must be a better way.

If I can help at all, I will try to chip in, at the very least documentation or something once its developed.