In this day and age, there’s no reason why online accounts shouldn’t have two-factor authentication (2FA) options. Given the number of database hacks trying to access user information, enabling 2FA where and when you can is a must these days. Gaming accounts are obvious targets as well and Nintendo has added two-factor authentication to its Nintendo Network accounts. These accounts are used to log into your Nintendo Switch or 3DS systems, as well as online.
By doing so, Nintendo has joined the likes of Xbox, Blizzard, and Steam, among others, to offer 2FA for their users. The functionality is opt-in and can be done through the Nintendo Account website. After verifying your email address you can finish setting up 2FA which will use your Google Authenticator app on your Android or iOS device. Once installed, you scan a QR code on the Nintendo Network account page and then enter the six-digit code displayed in your Google Authenticator app to finish the setup. After it’s been set up, every time you log into one of your devices with your Nintendo Network account, you’ll be required to enter a code from the Authenticator app in order to successfully login.Source: Nintendo