title: Unable to add accounts in Xcode 6 beta 6
body: <p>I've lost my Apple developer account settings in this new Xcode's preferences, so I tried to add it again... I set my account's credentials but I'm not able to sign in, and I always get the message <code>Could not parse server's response as a plist</code> </p>
  
  <p>Has anybody found the same problem? This is working fine in Xcode 5.1.1, although I have to add the account again everytime I have previously opened Xcode 6...</p>
  
  <p>Thanks</p>