Authorization required: sitemap.xml
Verification word: portly

Approve on your phone -- open or scan this on a device with your passkey:
  https://auth.ck1.me/a/eyJhbGciOiJIUzI1NiJ9.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6InBvcnRseSIsImp0aSI6IjU3ZWYyY2VlN2RlZTQ1NGI4NTAzMzZlNTg1NTA1YjA4IiwiaXNzIjoic2VydmVzLmNrMS5tZSIsImF1ZCI6ImF1dGguY2sxLm1lIiwiaWF0IjoxNzgzNjczMjM3LCJleHAiOjE3ODM2NzM1Mzd9.9EIeOh_BVmRc4NwgqZ3eWS0vBE9_75OPN7EHQHY_VwA

(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.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6InBvcnRseSIsImp0aSI6IjU3ZWYyY2VlN2RlZTQ1NGI4NTAzMzZlNTg1NTA1YjA4IiwiaXNzIjoic2VydmVzLmNrMS5tZSIsImF1ZCI6ImF1dGguY2sxLm1lIiwiaWF0IjoxNzgzNjczMjM3LCJleHAiOjE3ODM2NzM1Mzd9.9EIeOh_BVmRc4NwgqZ3eWS0vBE9_75OPN7EHQHY_VwA' -o 'sitemap.xml'