Tailscale is really great, part 28

I was trying to have a slightly weird SFTP client upload some files via Tailscale SSH, and it was failing, wanting an SSH key or a password that tailscale would accept, but all I really wanted was for it to do nothing and just let tailscale handle auth. While trying to figure out if I could get tailscale ssh to accept keys, I found the devs were once again way ahead of me; you can just tell SSH clients to use these creds:

username: ubuntu+password
password: [any]

i.e., append a literal +password to the username (here, ubuntu), and just provide any non-empty string as a password to satisfy its sense of duty. Voila.