:lol: guys… i need help…
how am i able to force logout the user using the applescript…
without any prompt…

u can use this

ignoring application responses
	tell application "loginwindow" to «event aevtrlgo»
end ignoring

"«event aevtrlgo» "

It is an invisible and magical apple event which will instruct your computer to logout without a confirmation dialog.
If you wanna “FORCE” the user (without saving changes to documents, etc.), you may kill previosly all running aplications. Eg:

tell application "Finder" to file of application processes whose visible is true
repeat with i in result
	if (i as text) does not end with "" and (i as text) does not end with "YOURNAME-HERE OR YOU WILL SUICIDE" then
		do shell script "kill -14 `ps -xww | grep -i " & quoted form of POSIX path of i & " | grep -v 'grep' | awk '{print $1}'`"
	end if
end repeat