[V2.41.1] Artifact Registry PyPI Keyring: No credentials could be found.

[mautini]

The issue appears to be very similar to #1166.

It seems that the latest version of google-auth does not work with keyring when fetching GCP credentials to install a library from a private GCP Artifact Registry. Rolling back to google-auth==2.40.3 resolves the problem.

Tested with keyring versions 24.3.1 and 25.6.0, and keyrings.google-artifactregistry-auth==1.1.2.

  Failed to find credentials, Please run: `gcloud auth application-default login or export GOOGLE_APPLICATION_CREDENTIALS=<path/to/service/account/key>`
  at /usr/local/lib/python3.10/site-packages/keyrings/gauth.py:58 in get_password
       54│     except Exception as e:
       55│       logging.warning("Failed to retrieve credentials from gcloud: {0}".format(e))
       56│ 
       57│     logging.warning("Artifact Registry PyPI Keyring: No credentials could be found.")
    →  58│     raise Exception("Failed to find credentials, Please run: `gcloud auth application-default login or export GOOGLE_APPLICATION_CREDENTIALS=<path/to/service/account/key>`")
       59│ 
       60│   def set_password(self,service,username,password):
       61│     raise NotImplementedError()
       62│ 
Cannot install [PRIVATE_PACKAGE].

Environment details

• OS: MacOS / Linux
• Python version: 3.10
• pip version: 25.0.1
• google-auth version: 2.41.1

Steps to reproduce

1. python3.10 -m venv ./venv
2. source ./venv/bin/activate
3. pip install keyring keyrings.google-artifactregistry-auth
4. export PIP_EXTRA_INDEX_URL="[GCP_PRIVATE_ARTIFACT_REGISTRY_URL]"
5. pip install [PRIVATE_PACKAGE]

Making sure to follow these steps will guarantee the quickest resolution possible.

Thanks!