AuthorizationError.USER_PERMISSION_DENIED error?

[stephe...@gmail.com]

Receiving following error when running python get_report_fields.py 

Followed this process (https://developers.google.com/adwords/api/docs/guides/oauth_playground#overview) to set up credentials.

No handlers could be found for logger "suds.client"

Traceback (most recent call last):

  File "get_report_fields.py", line 53, in <module>

    main(adwords_client, REPORT_TYPE)

  File "get_report_fields.py", line 39, in main

    fields = report_definition_service.getReportFields(report_type)

  File "build/bdist.macosx-10.5-x86_64/egg/googleads/common.py", line 323, in MakeSoapRequest

  File "/Users/stephen/anaconda/lib/python2.7/site-packages/suds/client.py", line 521, in __call__

    return client.invoke(args, kwargs)

  File "/Users/stephen/anaconda/lib/python2.7/site-packages/suds/client.py", line 581, in invoke

    result = self.send(soapenv)

  File "/Users/stephen/anaconda/lib/python2.7/site-packages/suds/client.py", line 619, in send

    description=tostr(e), original_soapenv=original_soapenv)

  File "/Users/stephen/anaconda/lib/python2.7/site-packages/suds/client.py", line 670, in process_reply

    raise WebFault(fault, replyroot)

suds.WebFault: Server raised fault: '[AuthorizationError.USER_PERMISSION_DENIED @ ; trigger:'<null>']'

Do not understand what to do?

Thanks Stephen