Tailscale has a nifty feature where they show when each user was "Last Seen" and grey out inactive users. We can use the last time a user's API key was updated to collect this information. <img width="1154" alt="image" src="https://user-images.githubusercontent.com/7416144/187583466-b8096fcd-8cc2-491b-9d8c-43b39b695899.png"> Related https://github.com/coder/coder/issues/3768