title: How to get user's email with Facebook SDK 3.1 on iOS?
body: <p>I'm opening the facebook session with the email permission like so:</p>
  
  <pre><code>- (void)facebookOpenSession {
      NSArray *permissions = @[@"email"];
      [FBSession openActiveSessionWithReadPermissions:permissions
                                         allowLoginUI:YES
                                    completionHandler:^(FBSession *session, FBSessionState state, NSError *error) {
          [self sessionStateChanged:session state:state error:error];
      }];
  }
  </code></pre>
  
  <p>And then the important snippet of session state changed looks like:</p>
  
  <pre><code>- (void)sessionStateChanged:(FBSession *)session
                        state:(FBSessionState) state
                        error:(NSError *)error {
      switch (state) {
          case FBSessionStateOpen: {
              [[FBRequest requestForMe] startWithCompletionHandler:^(FBRequestConnection *connection, NSDictionary&lt;FBGraphUser&gt; *user, NSError *error) {
               if (error) {
                  //error
               } else {
                   self.myFirstNameLabel.text = user.first_name;
                   self.myLastNameLabel.text = user.last_name;
                   // self.myEmailLabel.text = @"";
               }
           }];
      }
      ...
  </code></pre>
  
  <p>How do I actually extract the user's email? Is it in one of the provided variables, or do I have to make another call within the completion handler?</p>
  
  <p>Thanks in advance!</p>