Username or EmailPassword
And thats the whole source of much of the Mac's appeal. For the average use who has a set number of task and activity requirements, they have come to expect that it will either be doable by default with a reasonable level of ease or they can find a 'best of breed' application that they pay for and does just that. There is a GUI wizard for everything and the inner workings are so well abstracted away you could not just 'stumble' across 'advanced options' even if you knew where to look.
One may note these tend to be the more creative types who could care less about what it really takes to accomplish the task. They just know that when trying to do what ever, there seem to be more features that they would want that take less effort than the other to get going. Needless to say in the event the come across an activity that was not expected and is not commonly anticipated they just get stuck like ... "err .. that can't be done so don't ask"