This is just the first step in setting up a key to be able to upload keys using the web service API.
Maybe this is not what you want to do... ?
If you just want to create a credential to be used with our validation service, then you probably just want to create and upload a new id/key. You can either use our configuration tools for that or just generate your own ID/key. Then go to the upload page at:
https://upload.yubico.com/Please let me know if I got your question wrong here.
Best regards,
JakobE
Hardware- and firmware guy @ Yubico