LaundryOften

I would love a thirst bar. It could be enabled/disabled like anything else. You could make different tiers of canteens with leather and metal and attach it to your belt somehow. There could be a hotkey for drinking or it could work automatically without any animation, you would just need to keep it filled.

Try uninstalling your game, going to "https://account.vintagestory.at/" (it was really slow for me), and reinstalling the latest full version. At first, I was unable to update in game, and after manually updating from 1.18.8 to 1.18.10 I began to get the "auth" error as well. Reinstalling fixed it right away!