From the Nintendo 3DS Home Menu, go to System Settings. Select Network ID Settings from the menu. Choose one of the following options to see or change information about your Nintendo Network ID: Profile settings: Update the gender, region, time zone, and e-mail address.
The Nintendo 3DS family of systems can only support one Nintendo Network ID at a time. You may, however, format the device to abandon the current NNID and establish a fresh one. (The old account and purchases will not be deleted; they will remain linked to the same system in the future.)
Select the eShop from your Nintendo Switch’s Home screen. nSelect the user profile for which you wish to make purchases in the eShop. enter your Nintendo Account password if prompted. “Store!”
On the HOME Menu, select “System Settings.” Select the correct user account to access the Profile Settings by scrolling down. Scroll all the way down to the bottom of the settings and choose “Unlink Nintendo Account.” To unlink your Nintendo Account, select “Confirm,” then “Unlink.”
To log out of your Nintendo Account in a web browser, go to a Nintendo website (nintendo.com, accounts.nintendo.com, etc.). In the upper-right corner of the page, select your nickname/user icon. Select Sign out at the bottom of the list of options to cancel your Nintendo Account.
