LDAPAuthenticator with allowed_users

[christineleroy]

Bug description

Not using allowed_users. Any authenticated user will be allowed

Expected behaviour

I would like to configure a whitelist of users authorized to login to the jupyterhub with LDAPAuthenticator

Actual behaviour

All LDAP users can connect to the jupyterhub .

How to reproduce

c.LDAPAuthenticator.allowed_users = {'xxxxx'}
c.Authenticator.allowed_users = {'xxxxx'}

Your personal set up

• OS:ubuntu 18
• pip3 list | grep jupyter
  jupyter-client 6.1.12
  jupyter-core 4.7.1
  jupyter-packaging 0.10.1
  jupyter-server 1.6.4
  jupyter-telemetry 0.1.0
  jupyterhub 1.4.0
  jupyterhub-dummyauthenticator 0.3.1
  jupyterhub-firstuseauthenticator 0.14.1
  jupyterhub-idle-culler 1.1
  jupyterhub-ldapauthenticator 1.3.2
  jupyterhub-nativeauthenticator 0.0.7
  jupyterhub-systemdspawner 0.15.0
  jupyterhub-tmpauthenticator 0.6
  jupyterhub-traefik-proxy 0.1.6
  jupyterlab 3.0.7
  jupyterlab-pygments 0.1.2
  jupyterlab-server 2.1.4
  the-littlest-jupyterhub 0.1

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[consideRatio]

I transferred this issue from https://github.com/jupyterhub/the-littlest-jupyterhub.

@christineleroy are you sure you configured the LDAPAuthenticator correctly for TLJH? If so, this may be a bug in the LDAPAthenticator, otherwise its a support question related to TLJH configuration. Could you provide more details on how you configured TLJH to observe this? Then I can try to manually validate that part.

[consideRatio]

Closing in favor of #260