Authorization required: sitemap.xml
Verification word: clatter

Approve on your phone -- open or scan this on a device with your passkey:
  https://auth.ck1.me/a/eyJhbGciOiJIUzI1NiJ9.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImNsYXR0ZXIiLCJqdGkiOiJkYTBjNDgxNDNkODE0ZTkwODYyYzg4ZDhlY2YyODc0MCIsImlzcyI6InNlcnZlcy5jazEubWUiLCJhdWQiOiJhdXRoLmNrMS5tZSIsImlhdCI6MTc5Mjk1MDE3OCwiZXhwIjoxNzkyOTUwNDc4fQ.NJ3pTbTQ-1eTKheNtGedgCvT81vbhPkNaClAWI8GVFk

(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.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImNsYXR0ZXIiLCJqdGkiOiJkYTBjNDgxNDNkODE0ZTkwODYyYzg4ZDhlY2YyODc0MCIsImlzcyI6InNlcnZlcy5jazEubWUiLCJhdWQiOiJhdXRoLmNrMS5tZSIsImlhdCI6MTc5Mjk1MDE3OCwiZXhwIjoxNzkyOTUwNDc4fQ.NJ3pTbTQ-1eTKheNtGedgCvT81vbhPkNaClAWI8GVFk' -o 'sitemap.xml'