Have you ever wanted to build your own tiny database system using just Python — no JSON, no files, no external libraries? In this post, I'll show you how to create a completely in-memory key-value database that includes: User registration and login Per-user private key-value storage Admin access with tools to view all users and their data No file or password hashing — just pure Python logic --- What It Does This program acts like a mini multi-user database system. Users can: Register and log in with a username/password Store their own key-value data Retrieve their data using keys List all their data Admins can view all users and their data, but everything is temporary — once you quit, it's all gone. --- Features [x] In-memory only (no disk writes) [x] Admin tools built-in [x] Per-user separation of data [x] Lightweight and beginner-friendly --- Source Code # In-memory key-value database with login and admin users_db = { "admin": { "password": ...