Credentials in pip.conf for private PyPI

I have a private PyPI repository. Is there any way to store credentials in pip.conf similar to .pypirc?

What I mean. Currently in .pypirc you can have such configuration:

[distutils]index-servers = custom[custom]repository: https://pypi.example.comusername: johndoepassword: changeme

From what I've found that you can put in pip.conf:

[global]index = https://username:password@pypi.example.com/pypiindex-url = https://username:password@pypi.example.com/simplecert = /etc/ssl/certs/ca-certificates.crt

But here I see two problems:

1. For each url you'll need each time to specify the same username and password.
2. Username and password become visible in the logs, cause they are part of the url.

Is there any way to store username and password outside of url?