We need a little modification for our Shop Group Assign Function:
We went to give for our new customers "First time Buyers" (FTB) a Voucher call "WELCOME". For that, we add the customer after the registration in a group call "FTB", and add the voucher to this group. This point works already.
The customer can use or not the voucher for the first order. Now we need the modification:
We need to delete this user from this group after the first valid order! It make dont sense if they using the code or not. We leave the customer in the "Customer" or "Guest" and all other groups, only remove from this group ( for example : Group ID 12).
For that we need a coder.