He needs to setup a NIP-05 on kennedy24.com
(this is also why I have been pleading with nostr:npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6 to allow DNS TXT validation for NIP-05s)
Anyway - we can help out with that, one way or another. https://easyNostr.com