Docker jupyterhub直通抛出错误

我正在尝试使用此验证器，以便无需任何登录表单即可访问终端来宾会话。我安装了插件并尝试在docker上测试它

我的jupyterhub_config.py文件

c = get_config()
c.Spawner.debug = True
c.JupyterHub.authenticator_class = 'passthroughauth.PassThroughAuthenticator'
c.PassThroughAuthenticator.guest_user = 'ubuntu'
c.Authenticator.auto_login = True

错误消息：

[C 2020-10-26 16:28:07.920 JupyterHub application:89] Bad config encountered during initialization: The 'authenticator_class' trait of <jupyterhub.app.JupyterHub object at 0x7f29311429a0> instance must be a type, but 'passthroughauth.PassThroughAuthenticator' could not be imported

[C 2020-10-26 16:28:07.920 JupyterHub应用程序：89]初始化期间遇到错误配置：实例的“authenticator\u class”特征必须是类型，但无法导入“passthrough.passthroughuthenticator”