Go to your user profile.
Click Add authentication step under the Two-step authentication section.
Select Add security key.
When prompted by the browser, plug in and tap your security key.
(The interface might look different depending on your browser.)
Next, enter a name for your security key. This will help you tell them apart if you add multiple security keys.
Write down the backup code shown and store it in a safe place.
Next time you sign in, you can use this security key for two-step authentication instead of using receiving a verification code over SMS or through a phone app.
We support security keys through WebAuthn. This requires a modern browser.