Hello everyone, I have a simple question. I am planning to get used Wii U through local ad. The seller said he will give his "account (no credit card) so you can have access to the games." I am new to nintendo network and I wanted to make sure the seller is breaking all the ties with the account. What can I do other than change password to ensure that seller does not change password after I changed it? Unless if you suggest that this is a very bad idea, I will stay away from it. Thank you in advance.