plz help me in Trivia Quiz Game Template setup

hello friend i am new in unity world i have Trivia Quiz Game Template but when i import it i got this msg :

Assets/PuppeteerAssets/CS_Assets/CS_Scripts/PupUnityAdsController.cs(102,47): error CS0246: The type or namespace name `ShowResult' could not be found. Are you missing a using directive or an assembly reference? this is the script :

using System.Collections; using UnityEngine; using UnityEngine.Advertisements;

namespace Puppeteer { ///

     // How often to show the ad. The ad is shown by default when restarting after Game Over
     public int showAdEvery = 3;
     
     // The current count to the next advertisment
     public int adCount = 0;
     
     // This is set for testing purposes. When releasing the actual game, set this to false
     public bool testMode = true;

     // The screen that appears when the player watches an ad to the end and gets a reward
     public Transform rewardScreen;

     // Runs before Start()
     void Awake()
     {
         // Get the current ad count from PlayerPrefs
         adCount = PlayerPrefs.GetInt( "AdCount", adCount);
         
         // Checking and initializing unity ads
         if (Advertisement.isSupported)
         {
             // Initialize the ad service. The number is your app ID on the unity ads website
             if (testMode == true)
             {
                 // Runnig in test mode
                 Advertisement.Initialize(gameID, true);
             }
             else
             {
                 // Running in release mode
                 Advertisement.Initialize(gameID, false);
             }
         }
     }

     /// <summary>
     /// Counts the ad and then shows it
     /// </summary>
     public void CountAd()
     {
         // Count to the next time we need to show an ad
         if ( adCount < showAdEvery )
         {
             adCount++;
         }
         else
         {
             ShowAd(false);
         }
         
         // Record the current ad count in PlayerPrefs
         PlayerPrefs.SetInt( "AdCount", adCount);
     }

     /// <summary>
     /// Shows the ad, with or without a reward
     /// </summary>
     /// <param name="giveReward">If set to <c>true</c> give reward.</param>
     public void ShowAd( bool giveReward )
     {
         // Show the ad and check if the player watches it to the end for a reward
         if ( giveReward == true ) 
         {
             // If the ad is ready, show it and reset the ad counter
             if ( Advertisement.IsReady("rewardedVideoZone") )
             {
                 var options = new ShowOptions { resultCallback = HandleShowResult };

                 Advertisement.Show ("rewardedVideoZone", options);
             } 
         }
         else if ( Advertisement.IsReady("defaultZone") )
         {
             Advertisement.Show("defaultZone");
         }

         adCount = 0;

         // Record the current ad count in PlayerPrefs
         PlayerPrefs.SetInt( "AdCount", adCount);
     }

     /// <summary>
     /// Checks if an ad was viewed by the user to the end, then gives a reward
     /// </summary>
     /// <param name="result">Result.</param>
     private void HandleShowResult(ShowResult result)
     {
         switch (result)
         {
         case ShowResult.Finished:
             Debug.Log("The ad was successfully shown.");

             //Create the reward screen after we saw the ad
             if ( rewardScreen )    Instantiate(rewardScreen);
             
             break;
         case ShowResult.Skipped:
             Debug.Log("The ad was skipped before reaching the end.");
             break;
         case ShowResult.Failed:
             Debug.LogError("The ad failed to be shown.");
             break;
         }
     }

     /// <summary>
     /// At the start of the level counts towards showing the ad. For example after 3 times loading the level, an ad will be shown at the start of the level
     /// </summary>
     public void OnLevelWasLoaded()
     {
         CountAd();
     }
 }

}