AdMob Reward based video ad delegate

GADRewardBasedVideoAdDelegate.swift

func rewardBasedVideoAd(_ rewardBasedVideoAd: GADRewardBasedVideoAd, didRewardUserWith reward: GADAdReward) {
    //give user reward
}
    
func rewardBasedVideoAd(_ rewardBasedVideoAd: GADRewardBasedVideoAd, didFailToLoadWithError error: Error) {
    print("Reward based video ad failed to load: \(error.localizedDescription)")
}
    
func rewardBasedVideoAdDidReceive(_ rewardBasedVideoAd: GADRewardBasedVideoAd) {
    print("Reward based video ad is received.")
}
    
func rewardBasedVideoAdDidOpen(_ rewardBasedVideoAd: GADRewardBasedVideoAd) {
    print("Opened reward based video ad.")
}
    
func rewardBasedVideoAdDidStartPlaying(_ rewardBasedVideoAd: GADRewardBasedVideoAd) {
    print("Reward based video ad started playing.")
}
    
func rewardBasedVideoAdDidClose(_ rewardBasedVideoAd: GADRewardBasedVideoAd) {
    print("Reward based video ad is closed.")
}
    
func rewardBasedVideoAdWillLeaveApplication(_ rewardBasedVideoAd: GADRewardBasedVideoAd) {
    print("Reward based video ad will leave application.")
}