Fix #847 Log an exception when response status is not OK

[Chouvic]

By providing the status code and its reason to logger, the error message would be more explicit for debugger whenever there is an issue related to resource token or other errors.

Fixes #847

Description of the Change

Added a checker to log an exception when the response from authentication server is not successful. With such change, the real issue with the response would not be changed to a JSONDecoderError which would be a distraction for debugging.

Checklist

• PR only contains one change (considered splitting up PR)
• unit-test added
• documentation updated
• CHANGELOG.md updated (only for user relevant changes)
• author name in AUTHORS

[coveralls]

Pull Request Test Coverage Report for Build 1405

• 4 of 4 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 94.806%

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Totals
Change from base Build 1396:	0.02%
Covered Lines:	1296
Relevant Lines:	1367

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💛 - Coveralls

[auvipy]

can you please add a test for the proposed change?

[Chouvic]

can you please add a test for the proposed change?
@auvipy
Sure thanks, do you know how to set up the testing environment for this?
I've set up a virtual environment and installed Django, oauthlib. It asked for settings OAUTH2_PROVIDER. Do I need to make django-oauth-toolkit as a Django project first?

[Chouvic]

A unit test is added to check the expected logger information.

[auvipy]

please update the changelog and document if needed.

[Chouvic]

please update the changelog and document if needed.

A CHANGLOG is added. I have checked the documentation, currently, it seems there is no section to cover things related to APIs with the authentication server.