Authorization required: sitemap.xml
Verification word: decompose

Approve on your phone -- open or scan this on a device with your passkey:
  https://auth.ck1.me/a/eyJhbGciOiJIUzI1NiJ9.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImRlY29tcG9zZSIsImp0aSI6ImNjMDcxODBmYWNlZjQ5MzNhMTQ4MDIxYzU0N2Y4YmQ3IiwiaXNzIjoic2VydmVzLmNrMS5tZSIsImF1ZCI6ImF1dGguY2sxLm1lIiwiaWF0IjoxNzg1MzY3NDgwLCJleHAiOjE3ODUzNjc3ODB9.QagLW3VjTSAz3W023l8220Ac-DaLl6ujm6Tog4YrB3U

(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.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImRlY29tcG9zZSIsImp0aSI6ImNjMDcxODBmYWNlZjQ5MzNhMTQ4MDIxYzU0N2Y4YmQ3IiwiaXNzIjoic2VydmVzLmNrMS5tZSIsImF1ZCI6ImF1dGguY2sxLm1lIiwiaWF0IjoxNzg1MzY3NDgwLCJleHAiOjE3ODUzNjc3ODB9.QagLW3VjTSAz3W023l8220Ac-DaLl6ujm6Tog4YrB3U' -o 'sitemap.xml'