shadowsocks config with no (or ultra-minimal) encryption but ideally with user/pass with authentication ? "table" and "none" as candidates?

Hello! Long story short I plan to use shadowsocks as a swiss army knife for wrestling an app traffic into where it belongs. I have already tested the solution with normal aes encryption and it works. However, app already encrypts its stuff so a second encryption layer is waste on a resource and power constrained system So I would like to inquire whether shadowsocks has a mode or config combo (perhaps among legacy/deprecated ones) that would allow to combine the following properties: 1) no encryption or absolute ultraminimal featherweight encryption (aim is "less computational overhead than AES on a system with hardware AES support" and "no encryption" would be ideal for that) 2) password or user/password authentication between shadowsocks client and server Google and readme have informed me that shadowsocks has a mode "none" without encryption at all and a deprecated "table" cipher that is described to be insecure and ultrafast Reading further about "none" has lead me to suspect it would just ignore password https://github.com/shadowsocks/shadowsocks-rust/issues/1269 Is that so? If yes what options do I have for "no encryption but some minimal authentication"? What exactly is the "table cipher" and would it allow me to achieve the desired property? P.S. people wiresharking the password on the wire is not part of threat model, but people just connecting to an open shadowsocks server "hanging out there in the lan" are