Citizen codes

The Neon City Index assigns every citizen a personal 6-digit code that they use to do basic things such as purchase food, tech, enter certain buildings, validate themselves, etc. The codes can also be used to upload oneself into Code 0 (like an account).

Each code comes with a password that you must keep extremely private, for if they are stolen, your account is compromised and you could lose credit, etc. Getting the government to instate you a new code is very hard and may cost. In Code 0, your code is basically you, and if you are killed, your code is now invalid and can not be used again.