title: Uncustomizable message using PFLogInViewController
body: <p>Looking at the documentation:
  <a href="https://www.parse.com/tutorials/login-and-signup-views" rel="nofollow noreferrer">https://www.parse.com/tutorials/login-and-signup-views</a>,
  <a href="https://parse.com/docs/ios/api/Classes/PFLogInViewController.html" rel="nofollow noreferrer">https://parse.com/docs/ios/api/Classes/PFLogInViewController.html</a>
  and trying various things, as well as browsing the net;
  I can’t find any way to customize this message to my taste:
  <code>“Login Error invalid login credentials”</code></p>
  
  <p>I already made a post related to this issue:
  <a href="https://stackoverflow.com/questions/29314048/how-do-i-customize-login-error-invalid-login-credentials">How do I customize &quot;Login Error invalid login credentials&quot;?</a>
  with not much success.</p>
  
  <p>I don’t know if that qualifies as a bug, but in case there is no solution to this problem; there is clearly something missing in the API.
  If anyone thinks I am missing something, please let me know.</p>