SDonate Addon Problem

Hello,

I have a problem creating a VIP on my SDonate site. I can make all the changes, but when he asks to put the custom order, well there is something that I can not do. I would like that when someone buys a VIP on my site SDonate, it automatically recieves the VIP on my server. So I put the command: oxide.usergroup add VIP. except that it asks for the player's nickname. And I do not know how to make it automatically take the name or ID of the player who bought the VIP. Voila, if you want to join me, add me on discord:

SweaZy #7555.

Thank you and good evening.

Regards,

Thomas