def get_raw_access_token(self, method='POST', **kwargs):
        key = 'params'
        if method in ENTITY_METHODS:
            key = 'data'

        kwargs.setdefault(key, {})
        kwargs[key].update({'client_id': self.client_id,
                            'client_secret': self.client_secret})

        session = self.get_session()
        self.access_token_response = session.request(method,
                                                     self.access_token_url,
                                                     **kwargs)
        return self.access_token_response
Returns a Requests' response over the
dataset/ETHPy150Open litl/rauth/rauth/service.py/OAuth2Service.get_raw_access_token