You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

appauthn
0.0.13

This version was deleted from PyPI around 2024-04-15. Installing fails with:
$ pip3 install appauthn==0.0.13 ERROR: Could not find a version that satisfies the requirement appauthn==0.0.13
View other deleted versions of appauthn

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2024-04-14/ \ appauthn==0.0.13
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Or, download files manually

And install manually via pip:
AppAuthN-0.0.13-py3-none-any.whl (9.2KB)
AppAuthN-0.0.13.tar.gz (4.5KB)