wordpress logged in/out

I am having many logs (login & logout only) of the user “wordpress” while it is not registered user on my site , is this okay or any serious security threat ??

when I click on username wordpress (mysite.com/wp-admin/user-edit.php?user_id=0) it says “Access denied”

https://ww.wp.xz.cn/plugins/threewp-activity-monitor/