return [x for x in conn.identity.create_application_credential(user='74f1411dcda246579d969eb94ed7f56d')]
  File "/opt/stack/openstacksdk/openstack/identity/v3/_proxy.py", line 1276, in create_application_credential
    user_id=user.id, **attrs)
  File "/opt/stack/openstacksdk/openstack/proxy.py", line 353, in _create
    return res.create(self, base_path=base_path)
  File "/opt/stack/openstacksdk/openstack/resource.py", line 1187, in create
    base_path=base_path)
  File "/opt/stack/openstacksdk/openstack/resource.py", line 1008, in _prepare_request
    uri = base_path % self._uri.attributes
KeyError: 'user_id'

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