Returns the sharepoint list columns

def get_list_columns(self):
        """ Returns the sharepoint list columns """

        url = self.build_url(self._endpoints.get('get_list_columns'))

        response = self.con.get(url)

        if not response:
            return []

        data = response.json()

        return [self.list_column_constructor(parent=self, **{self._cloud_data_key: column})
                for column in data.get('value', [])]