Anyway to audit/log logins to router https/8443?

[5mall5nail5]

Hey all -

I put an AC68U in a business recently and they'd like to know when someone logs into the router from the outside. I changed the login user to a non-standard username and the password is very complex, https only, and :8443 (could change that even to be more secure) but regardless is there any logging of events when someone logs in from the outside? I cleared the system log and logged in remotely but didn't see it pop up.

Thanks,
Jon