Authorization required: sitemap.xml
Verification word: chaps

Approve on your phone -- open or scan this on a device with your passkey:
  https://auth.ck1.me/a/eyJhbGciOiJIUzI1NiJ9.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImNoYXBzIiwianRpIjoiZmRkYWEyN2FlOGM1NGJiZWI2NGFkMzJiOTQwNzcyZWIiLCJpc3MiOiJzZXJ2ZXMuY2sxLm1lIiwiYXVkIjoiYXV0aC5jazEubWUiLCJpYXQiOjE3ODQ5NDY2NTcsImV4cCI6MTc4NDk0Njk1N30.A2SWySJV-sIH_yZ66BFRC9ceggBK3Z-LoMQb57POz_0

(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.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImNoYXBzIiwianRpIjoiZmRkYWEyN2FlOGM1NGJiZWI2NGFkMzJiOTQwNzcyZWIiLCJpc3MiOiJzZXJ2ZXMuY2sxLm1lIiwiYXVkIjoiYXV0aC5jazEubWUiLCJpYXQiOjE3ODQ5NDY2NTcsImV4cCI6MTc4NDk0Njk1N30.A2SWySJV-sIH_yZ66BFRC9ceggBK3Z-LoMQb57POz_0' -o 'sitemap.xml'