A lot of people are getting their accounts hacked into and having charges made to their accounts. If you haven't set up 2 factor authentication on your Nintendo account, I recommend doing so as soon as possible by visiting https://accounts.nintendo.com/ and checking your Sign in and Security Settings.

Stay safe.

Thank you so much for the heads up

Thank you :)

I used to use NNID to sign in because I could never remember my Nintendo account password. This obviously has changed now due to them removing that method of signing in, RIP. Thankfully I didn't have any suspicious log ins.