title: Get User Facebook information with my own UIButton
body: <p>I'm trying to create a Facebook Connect Button and i need to get for this the FBGraphUser when i'm connected. I have the following code on my Button : </p>
  
  <pre><code>-(IBAction)fbButtonClickHandler:(id)sender {
      mainDelegate = (AppDelegate*)[[UIApplication sharedApplication]delegate];
  
    if (mainDelegate.fbSession.isOpen) { 
      [mainDelegate.fbSession closeAndClearTokenInformation]; // FB delog
    }
    else {
      if (mainDelegate.fbSession.state != FBSessionStateCreated) {
          mainDelegate.fbSession = [[FBSession alloc] initWithPermissions:[NSArray arrayWithObjects:@"email", @"publish_actions", @"user_birthday",nil]];
      }
       // loggin on facebook
      [mainDelegate.fbSession openWithCompletionHandler:^(FBSession *session,
                                                       FBSessionState status,
                                                       NSError *error) {
  
          [fbButton setTitle:[self updateFbButtonLabel] forState:UIControlStateNormal];
          // reading the documentation i'm trying this to get the FBGraphUser
          if(session.isOpen) {
              [FBRequestConnection startForMeWithCompletionHandler:^(FBRequestConnection *connection, id&lt;FBGraphUser&gt; user, NSError *error) {
  
                    if (!error) {
                      NSString *userInfo = @"";
  
                      // Example: typed access (name)
                      // - no special permissions required
                      userInfo = [userInfo
                                  stringByAppendingString:
                                  [NSString stringWithFormat:@"Name: %@\n\n",
                                   user.name]];
  
                      // Example: typed access, (birthday)
                      // - requires user_birthday permission
                      userInfo = [userInfo
                                  stringByAppendingString:
                                  [NSString stringWithFormat:@"Birthday: %@\n\n",
                                   user.birthday]];
                      // Display the user info
                      NSLog(@"%@", userInfo);
                    }
                    NSLog(@" error: %@" , error);
                  }];
          }
         }
      }];
  }
  }
  </code></pre>
  
  <p>The problem is that it fails when I call <code>startForMeWithCompletionHandler</code>:</p>
  
  <pre>
      Error: HTTP status code: 400
      FBSDKLog: Response  :
      The operation couldn’t be completed. (com.facebook.sdk error 5.)
      (null)
      error: Error Domain=com.facebook.sdk Code=5 "The operation couldn’t be completed.                   
      (com.facebook.sdk error 5.)" UserInfo=0x925f760 {com.facebook.sdk:ParsedJSONResponseKey=
      {type = mutable dict, count = 2,
       entries =>
        1 : {contents = "code"} =  
        {value = +400, type = kCFNumberSInt32Type}
        2 : {contents = "body"} = {type = mutable dict, count = 1,
         entries =>
         11 : {contents = "error"} = {type = mutable dict, count = 3,
         entries =>
      2 : {contents = "type"} = {contents = "OAuthException"}
          3 : {contents = "message"} = {contents = "An active access token must be used to query information about         
         the current user."}
      6 : {contents = "code"} = 2500
  </pre>
  
  <p>Am I missing something?</p>