Q: Unable to Sign In - Error authenticating iTunes Connect user (2006)

Have the same issue on iPhone 5S with iOS 9.3.2 (13F68)

I've raised the issue with Apple Support and via their Twitter feed (where they were quite responsive with the last App Store outage), but so far no response.  I assume the US Memorial Day holiday will delay any potential response until Tuesday at the earliest.

I would suggest everyone jumps onto one of the Apple support channels to raise this issue, as these discussion forums seem to be rarely monitored by Apple and aren't the best way to invoke a resolution.

Have the same issue on iPhone 6 with iOS 9.3.2

Delete an Reinstall won´t work

This has absolutely nothing to do with what the OP asked. His issue is with the iTunes Connect app sign in error, nothing to do with USB ports.

I have the exact same issue on my iPhone 5S on iOS 9.3.2

Error authenticating iTunesConnect user. (2006)

the same

Hey everyone apple resolved this issue

YES resolved.

wow, it's working

Apple fix that problem. you can really connect on iTunes Connects App

I had this issue after I set up two step verification on my iPhone.

Go to appleid.apple.com and log in

Then do the same on itunesconnect.apple.com

and on developer.apple.com

after doing this it worked on the app.

hope it helps.