Authorization required: sitemap.xml
Verification word: omen

Approve on your phone -- open or scan this on a device with your passkey:
  https://auth.ck1.me/a/eyJhbGciOiJIUzI1NiJ9.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6Im9tZW4iLCJqdGkiOiI4N2JhNWU4ZDQ0M2U0MWNlOTJkMjU1ZTQ2NTc0NTc3MCIsImlzcyI6InNlcnZlcy5jazEubWUiLCJhdWQiOiJhdXRoLmNrMS5tZSIsImlhdCI6MTc4NTU2NjU4MiwiZXhwIjoxNzg1NTY2ODgyfQ._3e13LA5mVtatHwvnpE1ZY3GzWcBg8HhhQDek-8IM2w

(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.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6Im9tZW4iLCJqdGkiOiI4N2JhNWU4ZDQ0M2U0MWNlOTJkMjU1ZTQ2NTc0NTc3MCIsImlzcyI6InNlcnZlcy5jazEubWUiLCJhdWQiOiJhdXRoLmNrMS5tZSIsImlhdCI6MTc4NTU2NjU4MiwiZXhwIjoxNzg1NTY2ODgyfQ._3e13LA5mVtatHwvnpE1ZY3GzWcBg8HhhQDek-8IM2w' -o 'sitemap.xml'