Nintendo Network, the online system used for both the Nintendo Switch and 3DS has now introduced the option of two-factor authentication. The extra security measure can be found at the bottom of the “sign-in and security settings” page after logging in. To make sure of the feature, users will require a mobile device (both iOS and Android work) and Google Authenticator. After activating, you will be required to pass the Google Authenticator in addition to regular details.
Nintendo Network now uses two-factor authentication
Keep that Switch extra safe.