Custom Username on Order Form

[Cled]

Hello,

 

 

 

 

I have a Module for WHMCS , it uses Client's Email as Username but i want Client to be able to choose Username on Order Form , i created Custom Field in Product / Services -> Custom Field

and its ID is 14

 

So i add this in Module code

 

$customfields = $params["customfield14"];

 

but i dont know why Module doesnt pull the information which was entered in customfield.

 

am i doing something wrong ?

 

 

thanks