Add more informative 401 error.

[tjacovich]

Adds a more verbose 401 error for users who may be using the old Authorization syntax.

[coveralls]

Pull Request Test Coverage Report for Build 15617276708

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 1 of 5 (20.0%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.1%) to 64.906%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
apigateway/utils.py	1	5	20.0%

Files with Coverage Reduction	New Missed Lines	%
apigateway/utils.py	1	48.7%

Totals
Change from base Build 15614572124:	-0.1%
Covered Lines:	1143
Relevant Lines:	1761

---

💛 - Coveralls

[tjacovich]

The reason for the special handling is because the Bearer:TOKEN doesn't register as a Bearer token so authlib throws an UnsupportedTokenTypeError and that does not have a description so the body of the error is empty without additional handling.