Nintendo Account Hack-Safe?

I'm in a family group of Nintendo from a stranger to use Switch Online because it is so cheaper.

Now I ask myself whether he can hack my Nintendi Account because he knows my email address and is the group's admin?

Don't worry about knowing your email, he can't do anything.

Should I be worried if he doesn't know my email address?

Then certainly not.

Why don't I have to worry? I don't know the person and I'm in a family group with him and such… Can nothing really happen?

No

Wouldn't accept it with an eagle address you wouldn't get far. You would need the password but you'd better not accept it

Don't accept the offer or assume that the person is hacking?

Hacking is unlikely, I find it more likely that he will pull you off

Okay thanks. I paid everything before and got all the data. Only now it occurred to me afterwards that the stranger could decide on my account or have a better chance or something…