python - OAuth2 InvalidScopeError in Backend Application flow -


i trying implement backend application flow access token datahug api (following instructions in https://api.datahug.com/#gettingstarted).

from oauthlib.oauth2 import backendapplicationclient requests_oauthlib import oauth2session  def get_access_token():     token_url = 'https://apps.datahug.com/identity/connect/token'     client_id = client_id     client_secret = client_secret     scope = 'datahug_api'      client = backendapplicationclient(client_id=client_id)     client.prepare_request_body(scope=[scope])     oauth = oauth2session(client=client)     token = oauth.fetch_token(token_url=token_url,             client_id=client_id,             client_secret=client_secret)      return token  if __name__ == '__main__':     token = get_access_token()     print(token)

when running code i'm getting invalidscopeerror, namely

user:dh user$ python so_test.py traceback (most recent call last):   file "so_test.py", line 21, in <module>     token = get_access_token()   file "so_test.py", line 17, in get_access_token     client_secret=client_secret)   file "/users/user/anaconda3/lib/python3.5/site-packages/requests_oauthlib/oauth2_session.py", line 244, in fetch_token     self._client.parse_request_body_response(r.text, scope=self.scope)   file "/users/user/anaconda3/lib/python3.5/site-packages/oauthlib/oauth2/rfc6749/clients/base.py", line 409, in parse_request_body_response     self.token = parse_token_response(body, scope=scope)   file "/users/user/anaconda3/lib/python3.5/site-packages/oauthlib/oauth2/rfc6749/parameters.py", line 376, in parse_token_response     validate_token_parameters(params)   file "/users/user/anaconda3/lib/python3.5/site-packages/oauthlib/oauth2/rfc6749/parameters.py", line 383, in validate_token_parameters     raise_from_error(params.get('error'), params)   file "/users/user/anaconda3/lib/python3.5/site-packages/oauthlib/oauth2/rfc6749/errors.py", line 325, in raise_from_error     raise cls(**kwargs) oauthlib.oauth2.rfc6749.errors.invalidscopeerror: (invalid_scope)

it seems problem in value scope='datahug_api', value suggested in datahug api. suggestions on how solve appreciated.


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