fix!: error codes

[moritzraho]

Description

This may be considered a breaking change, as we are changing error codes.

• avoid wrapping the error message returned by the server
• differentiate unknown 4xx and 5xx
• 403 => 401

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[shazron]

sorry, merged by mistake. Reverted, will push a new PR
#243

[shazron]

Created #244