Authorization required: sitemap.xml
Verification word: from

Approve on your phone -- open or scan this on a device with your passkey:
  https://auth.ck1.me/a/eyJhbGciOiJIUzI1NiJ9.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImZyb20iLCJqdGkiOiJhMWQ0N2ZlY2IwYzY0ZmU2OTM5NTY5MzI0MTAzODc1NyIsImlzcyI6InNlcnZlcy5jazEubWUiLCJhdWQiOiJhdXRoLmNrMS5tZSIsImlhdCI6MTc4NTE3NzIyMiwiZXhwIjoxNzg1MTc3NTIyfQ.sLkW7ddUvwu61_MH6WC1uEl386usWHtz8nBbr6qfNZ4

(No browser on this box? Cmd-click that link to open it on your laptop;
 it shows a QR you can scan with your phone.)

Then fetch the file -- this command waits until you approve:
  curl -fL 'https://serves.ck1.me/sitemap.xml?grant=eyJhbGciOiJIUzI1NiJ9.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImZyb20iLCJqdGkiOiJhMWQ0N2ZlY2IwYzY0ZmU2OTM5NTY5MzI0MTAzODc1NyIsImlzcyI6InNlcnZlcy5jazEubWUiLCJhdWQiOiJhdXRoLmNrMS5tZSIsImlhdCI6MTc4NTE3NzIyMiwiZXhwIjoxNzg1MTc3NTIyfQ.sLkW7ddUvwu61_MH6WC1uEl386usWHtz8nBbr6qfNZ4' -o 'sitemap.xml'