How to use a directory name with the logged in user in the script

Hi I have a small question.

I got a bit rusty in working with the mac command line.

I want to create a simple script. f.ex

every user has f.ex. a folder named Folder_To_Clean in his homedir.

rm -r /Users/Mac_User/Folder_To_Clean/*

now my question is how can I change this script so that I can run for every user after logging in? (and it should clear the Folder_To_Clean in his homedir

thought it was someting like this

rm -r /Users/%USER%/Folder_To_Clean/*

thanks alot

NESTi