I successfully submitted my app a few days ago and waited for a review, however I found a bug in my app later, therefore I rejected the submission and fixed it. But when I try to validate the app, Xcode shows me an error:
iTunes store operation failed: You are not authorized to use this service.
I also tried submit and export options, it shows the same error.
I googled it, someone else also met this error and posted it in stackoverflow, then tried the solution:
re-login -> quit Xcode -> open Xcode -> clean -> archive -> validate
it didn't work.
FYI:
Xcode 6.1.1
The code signing identity in target's building settings is iOS Distribution as well as the one in project's building setting.
I had this issue today and I believe it is due to an iTunes Connect outage as I was also unable to log into iTC via the web.
You can check the service status of Apple's Developer Services on Apple's website.
You can also do a quick search on Twitter to discover any other users who are having login issues with iTunes Connect.