How can I change the WiFi password without my Ring’s QR cide? I’ve lost the packaging and the device is fixed to the wall

I’ve had to change my WiFi password, but now I can’t connect my Ring Doorbell because it keeps asking for my QR Code - but I don’t have that. I can’t see it on the device anywhere. It’s very annoying, as my Ring Cameras work, it’s just the doorbell that requires this extra information. Why wasn’t I told this was a vital piece of information to keep? And why is it so difficult to do such a simple thing as changing a WiFi password?? Very poor show, Amazon.