For a post-apocalyptic world I'm writing, I have a bunch of, essentially, demons that have killed a large majority of humanity, destroying almost everything in that stands in their way, whether that be cities, animals, or even tanks. The demons have forced the remaining humans to basically live in walled cities. For clarity, these cities are basically just cramped buildings people live in run by the government that, while they have electricity, water, and other necessities, is still kind of crappy. The government in question is also has enacted a permanent state of martial law, forcing a lot of people to work on weapons and ammunition in barely held together factories or just forcing them to become soldiers to help fight the demons. There are also people, who through means most people don't know how except for a rare few, gained powers that are similar yet also distinct from the demons, and they are “employed” by the government to help them fight off the demons trying to kill the rest of humanity scattered throughout what’s left of civilization. Though, it’s less “employed,” and more them offering a bunch of stuff to these empowered people and hoping they agree, because some of them have the powers that are all but impossible for them to control with there weapons/supplies.
So, I wanted to have the remaining governments basically have a database of these empowered people, for plot reasons that mostly involve hacking, but I’m not sure how feasible that would be given the circumstances of my world. The powers I have in mind for the humans aren’t really made for helping with more technological-based problems, more the “kill that big glowy fire guy” type problems. And as for the current tech level, it's kind of a "use whatever scraps and wires leftover from destroyed cities, powerlines, handheld devices like phones, and whatever else they can get their hands on to try and maintain some semblance of society." Which leads me to my question: What exactly would it take for my world’s government to create and maintain a database of empowered people despite the problems created by the post-apocalyptic scenario?