Investigate why login sometimes fails

[Lonami]

bot_sign_in sometimes fails with IO(Kind(UnexpectedEof))

I'm also getting a few IO(Os { code: 104, kind: ConnectionReset, message: "Connection reset by peer" }) and IO(Os { code: 110, kind: TimedOut, message: "Connection timed out" }) but I doubt it's my connection

also I'm not sure if I'm misunderstanding how FuturesUnordered works, but if does indeed run all the tasks concurrently, grammers is being very slow logging in

Via https://t.me/gramme_rs/3169. We may just need to have reconnection in place but it would be good to try to figure out what's wrong.