Abuse of account login details?

I am the admin for our charity Zoom accounts.  I suspect that one of our users has given their login details to friends and/or family because I keep getting "Device or location you don't normally use" reports (See the image below)

Is there a way to receive a report of the location(s) so that I can challenge the user?

This is my first time in this forum, if my choice of Location is incorrect I apologise!

Many thanks

U3A Webmaster