I am trying to use the pypa/gh-action-pypi-publish action in GitHub to push a Python package to PyPI. I'm in the team that owns microbiomedata/nmdc-schema and successfully uses a GitHub action to deploy the nmdc-schema. I have also read PyPA's advice and tried to follow it precisely.

However, when it comes to authenticating against PyPI, I get this "no matter what I do"

Run pypa/gh-action-pypi-publish@v1.2.2
    user: __token__
    password: ${ secrets.pypi_password }
    packages_dir: dist
    verify_metadata: true
    pythonLocation: /opt/hostedtoolcache/Python/3.8.11/x64
    LD_LIBRARY_PATH: /opt/hostedtoolcache/Python/3.8.11/x64/lib
/usr/bin/docker run --name a33c111d135a08e424daf8f55d57f9438a27b_084f0c --label 8a33c1 --workdir /github/workspace --rm -e pythonLocation -e LD_LIBRARY_PATH -e INPUT_USER -e INPUT_PASSWORD -e INPUT_REPOSITORY_URL -e INPUT_PACKAGES_DIR -e INPUT_VERIFY_METADATA -e HOME -e GITHUB_JOB -e GITHUB_REF -e GITHUB_SHA -e GITHUB_REPOSITORY -e GITHUB_REPOSITORY_OWNER -e GITHUB_RUN_ID -e GITHUB_RUN_NUMBER -e GITHUB_RETENTION_DAYS -e GITHUB_ACTOR -e GITHUB_WORKFLOW -e GITHUB_HEAD_REF -e GITHUB_BASE_REF -e GITHUB_EVENT_NAME -e GITHUB_SERVER_URL -e GITHUB_API_URL -e GITHUB_GRAPHQL_URL -e GITHUB_WORKSPACE -e GITHUB_ACTION -e GITHUB_EVENT_PATH -e GITHUB_ACTION_REPOSITORY -e GITHUB_ACTION_REF -e GITHUB_PATH -e GITHUB_ENV -e RUNNER_OS -e RUNNER_TOOL_CACHE -e RUNNER_TEMP -e RUNNER_WORKSPACE -e ACTIONS_RUNTIME_URL -e ACTIONS_RUNTIME_TOKEN -e ACTIONS_CACHE_URL -e GITHUB_ACTIONS=true -e CI=true -v "/var/run/docker.sock":"/var/run/docker.sock" -v "/home/runner/work/_temp/_github_home":"/github/home" -v "/home/runner/work/_temp/_github_workflow":"/github/workflow" -v "/home/runner/work/_temp/_runner_file_commands":"/github/file_commands" -v "/home/runner/work/linkml-template-audit/linkml-template-audit":"/github/workspace" 8a33c1:11d135a08e424daf8f55d57f9438a27b  "__token__" "${ secrets.pypi_password }" "" "dist" "true"
Warning:  It looks like you are trying to use an API token to authenticate in the package index and your token value does not start with "pypi-" as it typically should. This may cause an authentication error. Please verify that you have copied your token properly if such an error occurs.
Checking dist/linkml_template_audit-0.0.1-py3-none-any.whl: PASSED, with warnings
  warning: `long_description_content_type` missing. defaulting to `text/x-rst`.
Checking dist/linkml_template_audit-0.0.1.tar.gz: PASSED, with warnings
  warning: `long_description_content_type` missing. defaulting to `text/x-rst`.
Uploading distributions to https://upload.pypi.org/legacy/
Uploading linkml_template_audit-0.0.1-py3-none-any.whl

  0%|          | 0.00/29.6k [00:00<?, ?B/s]
 27%|██▋       | 8.00k/29.6k [00:00<00:00, 48.7kB/s]
100%|██████████| 29.6k/29.6k [00:00<00:00, 107kB/s] 
NOTE: Try --verbose to see response content.
HTTPError: 403 Forbidden from https://upload.pypi.org/legacy/
Invalid or non-existent authentication information. See https://pypi.org/help/#invalid-auth for more information.

I was only wrapping my PyPI secret token in one pair of curly brackets! Two are required, like

${{ secrets.nmdc_schema_pypi_token }}


In my case the issue was that I added secrets as "environment secret" rather than "repository secret", leaving the latter empty.

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