Log in to your Discord Account, then click on the user settings icon (found in the bottom left of the logon screen - see example below) ;
Select "My Account" from the left hand column menu, then scroll down to the section "Security Keys", click on the button
;

You will now be asked to register your Fido2 key, click
;

You will then be asked to select where to save the passkey, select "Security key", then click
;

You are now notified that access to Discord will be prepared with your Fido2 security key - click
to proceed to the next step;

You will be asked to touch the button on your key (if your model has a fingerprint reader you may be asked to provide a finger swipe instead);

Next you will asked to touch the key;

Provided you press the button on the Fido2 key in the allowed time, the passkey details will be stored on your Fido2 key, and you will be presented with the following confirmation;

Having registered the key you will be asked to name the device, provide a suitable name then click
;

You will then be notified that the security key is activated (and it can now be used when logging on to your account).
At this stage you are strongly advised to download the backup codes (as a form of emergency access should Discord have difficulty using your key, or if you key is lost);

Finally you can confirm the key have been added to your list of Security Keys (or add additional keys);
