more elaborative error message

[drummerwolli]

i was trying this out from the examples:

tokens.configure()
tokens.manage('example', ['read', 'write'])
tokens.start()
tokens.get('example')

got an error message:

requests.exceptions.HTTPError: 400 Client Error: Bad Request for url: https://example.com/oauth2/access_token

this did not help in finding the real error which i got through printing out the real error message with print(r.text):

{"error":"invalid_scope","error_description":"Unknown/invalid scope(s): [write, read]"}

the line is https://github.com/zalando-stups/python-tokens/blob/master/tokens/__init__.py#L119 ... maybe we can have a more detailed error message, in case an error happens ...

[hjacobs]

👍