Authorization required: sitemap.xml
Verification word: favorable

Approve on your phone -- open or scan this on a device with your passkey:
  https://auth.ck1.me/a/eyJhbGciOiJIUzI1NiJ9.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImZhdm9yYWJsZSIsImp0aSI6Ijc4NWEzZjM5NDMxYjQ1MWJiNTgxYmJlNjJkZDBmMWNkIiwiaXNzIjoic2VydmVzLmNrMS5tZSIsImF1ZCI6ImF1dGguY2sxLm1lIiwiaWF0IjoxNzg0Nzg4NjAyLCJleHAiOjE3ODQ3ODg5MDJ9.2-pM-gA6-qujQE3_CAo6Y8Jk8WEWvPDMi9duQR55lDk

(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.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImZhdm9yYWJsZSIsImp0aSI6Ijc4NWEzZjM5NDMxYjQ1MWJiNTgxYmJlNjJkZDBmMWNkIiwiaXNzIjoic2VydmVzLmNrMS5tZSIsImF1ZCI6ImF1dGguY2sxLm1lIiwiaWF0IjoxNzg0Nzg4NjAyLCJleHAiOjE3ODQ3ODg5MDJ9.2-pM-gA6-qujQE3_CAo6Y8Jk8WEWvPDMi9duQR55lDk' -o 'sitemap.xml'