Turn off echo for WiFi Server/Client

[puterboy]

I am using the WiFiServer and WiFiClient (and WiFiMulti) libraries to allow me to Telnet over WiFi to communicate with the program running on the esp32.
One of the first things my esp32 program does when a remote client connects is to ask for a password.
For obvious reasons, I would like to disable the echo when the user enters a password from a remote telnet client.

How is this done in the Arduino/esp32 context?

I am using "standard" Linux Telnet to access the esp32 over WiFi from a Linux bash terminal.

Thanks!