WordPress password hacked

I am posting this, does anyone know about why would I get a Wordfence notifcation about someone logging in, is it just a fluke ?

I had to reset my password via the database.

===== message ====

looks like my passowrd was hacked, but I only got an Wordfence notification email today when I tried logging in.

I got the following email, which indicates someone in the US logged in.

A user with username “fdfdfdf” who has administrator access signed in to your WordPress site.
User IP: 173.227.74.5
User hostname: 173.227.74.5
User location: Austin, United States

NOTE: You are using the free version of Wordfence. Upgrade today:
– Advanced features like IP reputation monitoring, country blocking, an advanced comment spam filter and cell phone sign-in give you the best protection available
– Remote, frequent and scheduled scans
– Access to Premium Support
– Discounts of up to 90% for multiyear and multi-license purchases