When you sign up for KnowledgeOwl, you'll enter your email and password. This is what you will use to log in to the KnowledgeOwl application. You will also enter your first and last name, which is what we'll call you and how you will appear as an author.
You can edit and customize your user profile under Your Account > Users (or Account > My Settings if you are not a full account admin). To learn more about managing users, read the User Management guide.