I already have a Nintendo account created on a 3DS. When adding a new user on a Switch, I have a choice between logging into an existing account or creating a new one.
Will I be able to use the account I have created on a 3DS with a Switch? If yes, what will be carried over from 3DS to the Switch? Or is it just that I will have the same username and password on both systems, but apart from that the accounts will be separate?