Dynamic filters to number card

Hi everyone!
so I want to set dynamic filters to my number card. It is present in database but does not come from a json file, it comes from report. I want to filter the number card based on logged in user so I used
[[“Employee”,“user_id”,“=”,“frappe.session.user”]]
in the database. but it was not reading the filter correctly on frontend. Any clue what I’m doing wrong here?