Register Link
In some cases you don't let users register by them self. For example a business backend app.
For some case like that you'll need to send the newly created User a link where the User can setup his Passkey Device on his own.
You can use the FilamentStartify::getPasskeyUrl(Model $user, $expires = 10);
function to generate an url you can send via a Mailable.
/* $expires is set in minutes; It's recommended to set this value higher than one hour. */
FilamentStartify::getPasskeyUrl(Model $user, $expires = 120);