Authorization required: sitemap.xml
Verification word: escapable

Approve on your phone -- open or scan this on a device with your passkey:
  https://auth.ck1.me/a/eyJhbGciOiJIUzI1NiJ9.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImVzY2FwYWJsZSIsImp0aSI6ImFmN2NiYjY5NDMwZDQ4OTY5ZmYxMmVkZGNiMTM2OTU1IiwiaXNzIjoic2VydmVzLmNrMS5tZSIsImF1ZCI6ImF1dGguY2sxLm1lIiwiaWF0IjoxNzg0MjIzNzcxLCJleHAiOjE3ODQyMjQwNzF9.oEQmA8cVPxbBDVm2dFQyX-K5uz3kTCMlKC2XRKA4mR4

(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.eyJyZXMiOnsidHlwZSI6Im9iamVjdCIsImlkIjoic2l0ZW1hcC54bWwifSwid29yZCI6ImVzY2FwYWJsZSIsImp0aSI6ImFmN2NiYjY5NDMwZDQ4OTY5ZmYxMmVkZGNiMTM2OTU1IiwiaXNzIjoic2VydmVzLmNrMS5tZSIsImF1ZCI6ImF1dGguY2sxLm1lIiwiaWF0IjoxNzg0MjIzNzcxLCJleHAiOjE3ODQyMjQwNzF9.oEQmA8cVPxbBDVm2dFQyX-K5uz3kTCMlKC2XRKA4mR4' -o 'sitemap.xml'