Question about using a fingerprint and hide credential in base64

[gemini2186]

I have couple questions 😏

I run server like this
chisel server --keyfile '<key file path>' -p 9312 --socks5
and i connected like this:
chisel client --fingerprint '<see server output>' <server-address>:9312 socks
I discovered that if you do not specify the --fingerprint parameter in the client startup line, the connection will still be successful. Is this how it should be?

How can i hide my credential in base64, when i use parameter --auth. Need an example. It will be like this:
chisel server --auth | <base64_line> --keyfile '<key file path>' -p 9312 --socks5 ?

Thanks for any help!