title: iOS Parse.com Facebook Login - valid email address error
body: <p>Using the sample code, I continually get a nil user and an error in the block for the login:</p>
  
  <p>2015-11-09 17:39:16.017[90448:3746935] [Error]: You must use a valid email address. (Code: 142, Version: 1.9.1)
  Printing description of error:
  Error Domain=Parse Code=142 "You must use a valid email address." UserInfo=0x7fb403c39f20 {code=142, temporary=0, error=You must use a valid email address., NSLocalizedDescription=You must use a valid email address.}</p>
  
  <p>Here's the code:</p>
  
  <pre><code>FBSDKAccessToken *accessToken = [FBSDKAccessToken currentAccessToken];
  if (accessToken)
  {
      [PFFacebookUtils logInInBackgroundWithAccessToken:accessToken block:^(PFUser * _Nullable user, NSError * _Nullable error) {
          if (!user) {
              NSLog(@"Facebook login cancelled.");
          } else {
              NSLog(@"User now has publish permissions!");
              [self loadFBAccountInfo];
          }
      }];
   }
   else
   {
      [PFFacebookUtils logInInBackgroundWithReadPermissions:@[ @"email", @"public_profile" ] block:^(PFUser *user, NSError *error) { // , @"publish_actions"
          if (!user) {
              NSLog(@"Facebook login cancelled.");
          } else {
              NSLog(@"User now has publish permissions!");
              [self loadFBAccountInfo];
          }
      }];
   }
  </code></pre>
  
  <p>Any help is appreciated!</p>