How to turn off tweet notifications for a specific user in the official Twitter app for Mac?

Hello everyone
I am wondering if one of you know the VO command to turn off tweet notification for some specific user on the Native twitter app for Mac OS or if you know the workaround to turn off it.
Accidentally hit a few keys on my keyboard couple weeks ago and I did not know which were, When I go to turn off the tweets notifications from the iOS device the interesting thing is I have turn off the notification for this user however only I receive the tweet notification every single time who this user post something on the Mac.
Thanks and advance.