Log in to your Shopify account, then select the option "Security";
In order to add a Fido2 key as an authentication option, click on the button "Create a passkey";

You are now ready to register a Fido2 key with Shopify, and will presented with the following screen, click
;

Next you are asked for permission for the site to access your Fido2 key, insert the key into an available USB port then click
;

When asked where to save this passkey, select the option "Security Key", then click
;

Next you are asked for permission for the site to access your Fido2 key, insert the key into an available USB port then click
;

At this point you will be asked to provide the PIN code that protects your Fido2 key;

Enter the PIN code for your key then click
, and 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);

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;

Click "OK", and the FIIDO2 key will be registered with Shopify as soon as you verify the key, and a confirmation will show that the passkey has been created;
