title: I can't create an iTunes Connect user with an email containing a plus sign
body: <p>I used to be able to add or be added as a user to an iTunes Connect team with an email containing a plus sign. This was convenient because I was able to be part of multiple iTunes Connect teams with the same Gmail email address (emails sent to foo+bar@gmail.com always go to foo@gmail.com). Now I am getting the error <code>The email address you entered is invalid. Please try again.</code></p>
  
  <p>Is using emails with a plus sign no longer possible? Is there a workaround?</p>