She emailed them her NSA password ?
I'm sure it was even less complicated than that. Attributing the requests to her was part of the cover up. She is an innocuous, uninterested and far removed character in as far as the general election campaign would go. REMEMBER, Hillary was supposed to win. A lot of what is being discovered now is damage control resulting in the wrong people (Trumps people) getting to the bottom of this stuff.
I imagine, when the light first shined on "who" requested the names of surveilled citizens, some documentation had to be created and the "official requests" had to be attributed to someone. My money is that, the names were leaked with verbal direction (nothing in writing) or someone with the information simply did it without authorization for the benefit of the democrats. The better question for her is, did she know someone was using her as the source of the requests? And of course, who was it that put her as the source?