title: Unable to use FBSDKGraphRequest with Parse login
body: <p>I'm using Parse to login with facebook on my app.</p>
  
  <p>This is my code :</p>
  
  <pre><code>    //set permissions required
      let permissionsArray = ["user_about_me"]
      //log in
      PFFacebookUtils.logInWithPermissions(permissionsArray, block: { (pUser, pError) -&gt; Void in
  
  
          //if user is correctly loggin
          if pUser != nil &amp;&amp; pError == nil{
  
  
              //request facebook for more informations
              var request = FBSDKGraphRequest(graphPath: "me", parameters: nil)
  
              request.startWithCompletionHandler({ (connection, result, error) -&gt; Void in
                  NSLog("\(error)")
  
              })
  
          }
      })
  </code></pre>
  
  <p>I am correctly log in with parse, but when i'am asking for my informations, have always have this message :</p>
  
  <pre><code>com.facebook.sdk:FBSDKGraphRequestErrorParsedJSONResponseKey={
      body =     {
          error =         {
              code = 2500;
              message = "An active access token must be used to query information about the current user.";
              type = OAuthException;
          };
      };
      code = 400;
  }}
  </code></pre>