Authorization required: sitemap.xml
Verification word: entertain

Approve on your phone -- open or scan this on a device with your passkey:
  https://auth.ck1.me/a/eyJhbGciOiJIUzI1NiJ9.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImVudGVydGFpbiIsImp0aSI6ImEwM2RjNmQ0MjAyYTQ5YzY5MzI0YjcyYjVhYmUxMTdjIiwiaXNzIjoic2VydmVzLmNrMS5tZSIsImF1ZCI6ImF1dGguY2sxLm1lIiwiaWF0IjoxNzg0OTUzOTQ1LCJleHAiOjE3ODQ5NTQyNDV9.IWtarwDKJOsGfXvwDGhMPFgEiRvZvFpdvjiHdpVtlD0

(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.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImVudGVydGFpbiIsImp0aSI6ImEwM2RjNmQ0MjAyYTQ5YzY5MzI0YjcyYjVhYmUxMTdjIiwiaXNzIjoic2VydmVzLmNrMS5tZSIsImF1ZCI6ImF1dGguY2sxLm1lIiwiaWF0IjoxNzg0OTUzOTQ1LCJleHAiOjE3ODQ5NTQyNDV9.IWtarwDKJOsGfXvwDGhMPFgEiRvZvFpdvjiHdpVtlD0' -o 'sitemap.xml'