def __len__(self):
        return len(self._children)
Build the the auth URL so the user can authorize the app.
dataset/ETHPy150Open flosch/simpleapi/example_project/client/python/sapi/message.py/MessageElement.__len__--crossover with--dataset/ETHPy150Open soundcloud/soundcloud-python/soundcloud/client.py/Client._authorization_code_flow