chore(oauth): show an informative log when OAuthError is raised

[ykdojo]

This is similar to the way facebook/views.py logs an exception.

This feature was requested on #2142.

The original (closed) PR: #2175

Sample log:

Error processing OAuth
Traceback (most recent call last):
  File "/Users/ykdojo/Desktop/django-allauth/allauth/socialaccount/providers/oauth/views.py", line 79, in login
    return client.get_redirect(auth_url, auth_params)
  File "/Users/ykdojo/Desktop/django-allauth/allauth/socialaccount/providers/oauth/client.py", line 157, in get_redirect
    request_token = self._get_request_token()
  File "/Users/ykdojo/Desktop/django-allauth/allauth/socialaccount/providers/oauth/client.py", line 84, in _get_request_token
    raise OAuthError(
allauth.socialaccount.providers.oauth.client.OAuthError: Invalid response while obtaining request token from api.twitter.com. Response text: <?xml version='1.0' encoding='UTF-8'?><errors><error code="415">Callback URL not approved for this client application. Approved callback URLs can be adjusted in your application settings</error></errors>

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Provider Specifics

In case you add a new provider:

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• Add an entry of your provider in test_settings.py::INSTALLED_APPS and docs/installation.rst::INSTALLED_APPS.
• Add documentation to docs/providers.rst.
• Add an entry to the list of supported providers over at docs/overview.rst.

[pennersr]

Issue: Using f-strings breaks the python 3.5 build.

[pennersr]

Issue: From a logging perspective, these errors can occur in production and don't necessarily indicate exceptional situations that need direct attention. Hence, I think we need to use the regular error level.

Suggested change

	logger.exception('Error processing OAuth')
	logger.error("OAuth authentication error", exc_info=True)

[katomaso]

Please @ykdojo , could you move on with that? I personally think it is very important to have logging of errors

[varunsaral]

can i take up the work @pennersr ?

[pennersr]

@varunsaral Of course, this one seems to be abandoned... thanks.

[varunsaral]

@pennersr this can be closed,already fixed by #3392