Shell script problem

Hello,

I would like to create a Shell script that shows the disk space used by each users.

I would like to show it like this:

UserName1 : disk space used
UserName2 : disk space used
Username3 : disk space used

I tried with du and cut but I would like to try something else. Thank you.

>>6

I meant home.  But it's alright. I found the answer. :) 

Thank you. I hope to become good as you all. I still need more practice.