Some "activation key" websites ask you to log in via a "Steam checker." This is a phishing scam designed to steal your Steam account credentials.
City Car Driving version 1.2.1 is an older version of the simulator that requires a specific activation process to work properly. If you are trying to activate the game, please note that are unique codes generated based on your hardware's Product Code and your Serial Number . How to Get Your Activation Key City Car Driving Enter 1.2.1 Activation Key PC
If you want, I can help locate the official purchase/support page or draft a message to request key recovery from support. Which would you prefer? Some "activation key" websites ask you to log