• I have searched the issues of this repo and believe that this is not a duplicate.

Issue

For publishing, Pip and Twine allow for TLS Certificate mutual authentication instead of basic auth. In our enterprise environment, basic auth is disallowed, and only various forms of multi-factor are allowed. Please consider having more methods of authentication beyond basic auth, including mutual auth. Example Twine command

twine upload -u myuser -p "" --cert /Users/user/.certs/myca.pem --client-cert /Users/user/mycert.pem --repository-url https:/internalpypi.com/api/pypi/pypi-internal dist/*

Note the weird empty password, which is a bug in twine.