         // Facebook Sign-In
         self.fbLoginButton.delegate = self
         self.fbLoginButton.readPermissions = ["public_profile", "email"]
-   
+        self.fbLoginButton.loginBehavior = FBSDKLoginBehavior.SystemAccount
     }
 
     

            let graphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields": ""])
            graphRequest.startWithCompletionHandler() { connection, result, error in
                if error != nil {
                    print("Unable to get Facebook user info: \(error)")
                }
                else {
                    let fbId = result.valueForKey("id") as! String

        stopLoading()
        
        if error != nil {
            print("Unable to authenticate with Facebook. Error=\(error!.localizedDescription)")
        }
        else if result.isCancelled {
        }
