Authorization required: sitemap.xml
Verification word: march

Approve on your phone -- open or scan this on a device with your passkey:
  https://auth.ck1.me/a/eyJhbGciOiJIUzI1NiJ9.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6Im1hcmNoIiwianRpIjoiYzEwNmNhMjc2ZjAyNGMwMWI1MzQ3N2YzYjU3OGMzOWMiLCJpc3MiOiJzZXJ2ZXMuY2sxLm1lIiwiYXVkIjoiYXV0aC5jazEubWUiLCJpYXQiOjE3ODUxMTg4ODAsImV4cCI6MTc4NTExOTE4MH0.tEgj4AcMFAj72FTQL9B7BTJdj2V80cg2dPYKg6L6K-g

(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.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6Im1hcmNoIiwianRpIjoiYzEwNmNhMjc2ZjAyNGMwMWI1MzQ3N2YzYjU3OGMzOWMiLCJpc3MiOiJzZXJ2ZXMuY2sxLm1lIiwiYXVkIjoiYXV0aC5jazEubWUiLCJpYXQiOjE3ODUxMTg4ODAsImV4cCI6MTc4NTExOTE4MH0.tEgj4AcMFAj72FTQL9B7BTJdj2V80cg2dPYKg6L6K-g' -o 'sitemap.xml'