We can now start jupyterhub (instead of jupyter), with this command:
jupyterhub
This results in the following display that will appear in the command console window:
[I 2018-01-24 03:47:02.175 JupyterHub app:871] Writing cookie_secret to /Users/ToomeyD/jupyterhub_cookie_secret[I 2018-01-24 03:47:02.216 alembic.runtime.migration migration:117] Context impl SQLiteImpl.[I 2018-01-24 03:47:02.216 alembic.runtime.migration migration:122] Will assume non-transactional DDL.[I 2018-01-24 03:47:02.220 alembic.runtime.migration migration:327] Running stamp_revision - 3ec6993fe20c[W 2018-01-24 03:47:02.247 JupyterHub app:955] No admin users, admin interface will be unavailable.[W 2018-01-24 03:47:02.247 JupyterHub app:956] Add any administrative ...