If you’re a Switch owner and you haven’t turned on two-factor authentication for your Nintendo account yet, you might want to do so. Having two-factor authentication turned on is a good idea regardless, but there are reports from Switch owners that unsavory types are attempting to log into their Nintendo accounts and potentially making purchases using saved payment information.
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https://www.slashgear.com/nintendo-switch-two-factor-security-how-to-turn-it-on-and-why-20617442/