Please set up 2FA on your Nintendo accountIf you want to protect your games, purchase info, and screenshot hoards more securely, then you'll want to set up two-factor authentication (2FA) on your Nintendo Switch. If you opt-in, you'll now be asked for a special code (generated using Google Authenticator) as well as your usual password when logging into your account. You'll need to get the Google Authenticator app if you haven't already, but it's free to download on the App Store, so that should be relatively painless. Remember that if you stream your Switch via a capture card that anything that appears on your screen will appear for others to see as well.
Note: You can use any app that supports OTP (one-time-password) generation — like 1Password — in place of Google Authenticator. If you want further protection, you might want to set up Switch parental controls as well.
The key
Google Authenticator App
Free at App Store
Free at Google Play Store
Get passcodes for 2FA
Use the keys that this service provides to u...
Source:
Please set up 2FA on your Nintendo account