Remove hasChargeableResources and checkIfCustomerExists endpoints - #208

A new Trusted Publisher for the currently running publishing workflow can be created by accessing the following link(s) while logged-in as an owner of the package(s):

Trusted Publishers allows publishing packages to PyPI from automated environments like GitHub Actions without needing to use username/password combinations or API tokens to authenticate with PyPI. Read more: https://docs.pypi.org/trusted-publishers