How can I get user login history for Jupyterhub

How can I get user login history for Jupyterhub ?

I see there is some information being printed in logs when the user log in.

Are there any other way to get user login history & amount of time the user logged in ? using events/api-calls etc ?

I log everytime a user starts/stops a notebook by calling an external API. But I wonder if that information is in the jupyterhub database.