draconisplusplus/subprojects/curl-8.10.1/docs/cmdline-opts/proxy-tlsuser.md

c	SPDX-License-Identifier	Long	Arg	Help	Added	Category	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	proxy-tlsuser	<name>	TLS username for HTTPS proxy	7.52.0	proxy tls auth	single	proxy proxy-tlspassword	--proxy-tlsuser smith -x https://proxy $URL

--proxy-tlsuser

Set username for use for HTTPS proxy with the TLS authentication method specified with --proxy-tlsauthtype. Requires that --proxy-tlspassword also is set.

This option does not work with TLS 1.3.