It's not uncommon to forget your Raspberry Pi password, and there are a number of ways to recover your system.

On the Raspberry Pi Imager, edit the OS customization settings, specifically the "Configure wireless LAN" section under the General tab and add your network name and password.

He calls his project “guestwlan” and it’s set up to run on a Raspberry Pi with a touch screen. When a potential WiFi user approaches the Pi and requests access to the network, the Pi ...