How to set that admin authorizes users

JupyterHub, I want any users with email can sign up but authorize by iadmin.
I did so in TLJH by:
curl -L The Littlest Jupyterhub | sudo -E python3 - --admin iadmin
sudo tljh-config set auth.type nativeauthenticator.NativeAuthenticator
sudo tljh-config set auth.NativeAuthenticator.admin_users iadmin
sudo tljh-config set auth.NativeAuthenticator.ask_email_on_signup true

Now I want to install JupyterHub on Microk8s. How do I implement the function just like I did on TLJH? Thanks.

You can map your authenticator configuration to the hub.config section in Z2JH:

E.g.

hub:
  config:
    Authenticator:
      NativeAuthenticator:
        admin_users:
          - iadmin

Thanks Manics. I try the following config file and it works.

hub:
    config:
        JupyterHub:
            authenticator_class: nativeauthenticator.NativeAuthenticator
                Authenticator:
                    admin_users:
                        -  iadmin