title: Simple account control system
body: <p>My program is a TCP socket server, which should be managed over a network by a command-answer system. Command(request)-answer system is not a problem: a client send a packet, a server receive it and generates a response. Packets are just a sequences of bytes.<br>
  The issue is that I have to create a simple account system. My server should store and manage two account types: "administrator" and "simple user". Therefore I should have the things: a registration, authentication and a password storage systems. How this can be simply done on Qt5? For example, I simply can send user names and passwords (or password hashes) over a network, but how an administrator account can be initially created on the server in a normal way? I don't have strict security requirements, but I want to create a normal system that would make sense.</p>