title: iTunes Connect add testers to group doesn't work
body: <p>I am using test flight to add testers in this way:</p>
  
  <p><code>iTunnes Connect</code> > <code>My Apps</code> > <code>MyProject</code> > <code>TestFlight (tab)</code> > <code>NEW GROUP</code></p>
  
  <p><a href="https://i.stack.imgur.com/CPTUJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CPTUJ.png" alt="enter image description here"></a></p>
  
  <p>Then i chose add new user to this group:
  <a href="https://i.stack.imgur.com/U6wwM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/U6wwM.png" alt="enter image description here"></a></p>
  
  <p>The status is "-" i remembered it should be "<strong>Invited</strong>" <code>Resend the invite</code>, the tester can't received the invitation. Not sure why.</p>