public RewardVideoClient(string adAppId, string adUnitId)
 {
     rewardedVideoClientPtr = (IntPtr)GCHandle.Alloc(this);
     RewardedVideoPtr       = Externs.AtmosplayAdsCreateRewardedVideo(rewardedVideoClientPtr, adAppId, adUnitId);
     Externs.AtmosplayAdsSetRewardedVideoAdCallbacks(
         rewardedVideoPtr,
         RewardedVideoDidReceivedAdCallback,
         RewardedVideoDidFailToReceiveAdWithErrorCallback,
         RewardedVideoVideoDidStartPlayingCallback,
         RewardedVideoDidClickCallback,
         RewardedVideoDidRewardCallback,
         RewardedVideoVideoDidCloseCallback,
         RewardedVideoDidCompleteCallback
         );
 }