Set Referral

curl --request POST \
  --url https://v3.minestorecms.com/api/cart/setReferral \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "ref_code": "ABC123"
}'

{
  "success": true,
  "message": "<string>"
}