We're so excited you're trying Dia! Because your friend shared the Dia love, you'll receive $25 off your first Dia Box or Shop order over $50. You should've received a link from your friend. Click that link, then you'll be shown a code. Just copy and paste that code when you're checking out on your first Dia Box or Shop order, and your credit will be applied!
Just a heads up, your referral credit can't be combined with any other promotions. A referral promo code will only give you $25 off your first purchase from Dia.
If you lose your promo code, click on your friend's referral link again, and you'll get a new one to replace the one you've lost.