How to add a security key to your Google account without activating Advanced Security
We've gone over why using two-factor authentication on your online accounts is a good idea, and showed you how to set it up for your Google account as well as how to get started with Authy if you use more than one phone or computer. But we're not done yet!
from https://www.imore.com/how-add-usb-2fa-key-your-google-account-without-activating-advanced-security
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