Paid Subscrption with a redeem code? [REQUEST]

[dale_202]

Hi, im new here so if this is in the wrong sections you can move this.

Basically i have installed the latest version of smf, and i have activated the paid subscriptions mod. But i would like to have a 1 time code redeem as a payment option. An egsample would be a membergroup called 'VIP' and to get into this group you would have to activate a code '1KRMFG-34FT65' to be a part of this group. If there is a mod like this or similar please temm me, if not can anyone make this?   

Thanks,
Dale