docs: handle a missing Authorization header in README examples

[ucsurf]

Thanks for the invite to send this.

In v3, parse() expects a string, so the README examples now pass req.headers.authorization ?? '', matching the upgrade instructions. That way a request without an Authorization header gets undefined back (and a 401 in the http server example) instead of throwing.

Docs only; no code changes.

[blakeembrey]

Suggested change

	const user = parse(req.getHeader('Proxy-Authorization') ?? '');

[ucsurf]

Applied, thanks!

[blakeembrey]

Awesome, thanks! I think in a real scenario a ternary (e.g. skipping parse entirely) might be warranted, this is perfect for example code 🙏

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (0ea09f3) to head (7fc82f7).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #108   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines           38        38           
  Branches        10        10           
=========================================
  Hits            38        38           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.