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No, you do not need to login to see this article.
Set up membership registration for your knowledge base
Service Hub Professional and Enterprise accounts can set up membership for knowledge base articles. When you make a knowledge base article private with registration required, a registration email is sent to contacts who are members of the selected lists so they can set up a password.
As contacts are added to these lists in the future, they'll also receive an email to complete their password registration. The language of this email is set by your domain's primary language. There is a two minute delay after setting your content to private before registration emails are sent out.
p.s. the pw for Peter is 1234Test!