Verify ownership web master central problem with authentication google account redirect

I'm trying to verify my site with a domain in appspot.com but i use the authentication whit google account when the web master central try to verify appears an error

  "We weren't able to verify your site: "

cuz . Your verification file r开发者_JAVA百科edirects to a disallowed location , the redirect goes to https://www.google.com/accounts/ServiceLogin?... so how can i verify my site ?, can i disabled de athentication? or what is the best way ... I hope some one can help me. Thx.

Setup a custom handler for that file (Python|Java), and make sure you are not requiring login to view that url (Python|Java).