All you need to ut is log into your Nintendo account, then find the élancé choix to redeem a code. You can also redeem it individually through your Nintendo Switch Établissement pépite Wii U Boutique. If you are a Nintendo eShop account holder, you can get access to free Nintendo https://www.becharge.be/be-fr/Acheter/jeux-et-apps-Nintendo-eShop-4-184