diff --git a/src/android/AdMobConfig.java b/src/android/AdMobConfig.java
index c8144c5c..b0124b50 100644
--- a/src/android/AdMobConfig.java
+++ b/src/android/AdMobConfig.java
@@ -13,6 +13,7 @@
 
 public class AdMobConfig {
     /* options */
+    private static final String OPT_USER_ID = "userId";
     private static final String OPT_PUBLISHER_ID = "publisherId";
     private static final String OPT_INTERSTITIAL_AD_ID = "interstitialAdId";
     private static final String OPT_REWARD_VIDEO_ID = "rewardVideoId";
@@ -76,6 +77,7 @@ public class AdMobConfig {
     // Reward Video
     private static final String TEST_REWARDED_VIDEO_ID = "ca-app-pub-3940256099942544/5224354917";
     private String rewardVideoId = "";
+    private String userId = "";
 
 
     public void setOptions(JSONObject options) {
@@ -119,7 +121,10 @@ public void setOptions(JSONObject options) {
         if (options.has(OPT_AUTO_SHOW_INTERSTITIAL)) {
             this.autoShowInterstitial = options.optBoolean(OPT_AUTO_SHOW_INTERSTITIAL);
         }
-
+        if (options.has(OPT_USER_ID)) {
+            this.userId = options.optString(OPT_USER_ID);
+        }
+        
         if (options.has(OPT_LOCATION)) {
             JSONArray location = options.optJSONArray(OPT_LOCATION);
             if (location != null) {
@@ -175,6 +180,7 @@ public void setInterstitialOptions(JSONObject options) {
     public void setRewardVideoOptions(JSONObject options) {
         try {
             this.autoShowRewardVideo = (Boolean) options.remove(OPT_AUTO_SHOW);
+            this.userId = (String) options.remove(OPT_USER_ID);
         } catch (NullPointerException ignored) {
         }
         this.setOptions(options);
@@ -243,6 +249,10 @@ public String getRewardedVideoAdUnitId() {
         return rewardVideoId;
     }
 
+    public String getUserId() {
+        return userId;
+    }
+
     private static boolean isEmptyAdUnitId(String adId) {
         return adId.length() == 0 || adId.indexOf("xxxx") > 0;
     }
diff --git a/src/android/rewardvideo/RewardVideoExecutor.java b/src/android/rewardvideo/RewardVideoExecutor.java
index 60eeb2a2..3caffd93 100644
--- a/src/android/rewardvideo/RewardVideoExecutor.java
+++ b/src/android/rewardvideo/RewardVideoExecutor.java
@@ -46,7 +46,9 @@ public void run() {
 
                 rewardedVideoAd = MobileAds.getRewardedVideoAdInstance(cordova.getActivity());
                 rewardedVideoAd.setRewardedVideoAdListener(new RewardVideoListener(RewardVideoExecutor.this));
+                rewardedVideoAd.setUserId(plugin.config.getUserId());
                 Log.w("rewardedvideo", plugin.config.getRewardedVideoAdUnitId());
+                Log.w("rewardedvideo:userId", plugin.config.getUserId());
 
                 synchronized (rewardedVideoLock) {
                     if (!isRewardedVideoLoading) {
diff --git a/src/ios/CDVAdMob.h b/src/ios/CDVAdMob.h
index 140175d6..e396d0ce 100644
--- a/src/ios/CDVAdMob.h
+++ b/src/ios/CDVAdMob.h
@@ -59,6 +59,7 @@
 
 @property (nonatomic, retain) NSString* gender;
 @property (nonatomic, retain) NSString* forChild;
+@property(nonatomic, copy, nullable) NSString *userId;
 
 - (void) setOptions:(CDVInvokedUrlCommand *)command;
 
diff --git a/src/ios/CDVAdMob.m b/src/ios/CDVAdMob.m
index abb970ba..bd9fc125 100644
--- a/src/ios/CDVAdMob.m
+++ b/src/ios/CDVAdMob.m
@@ -33,7 +33,7 @@ @implementation CDVAdMob
 
 @synthesize publisherId, interstitialAdId, rewardVideoId, adSize;
 @synthesize bannerAtTop, bannerOverlap, offsetTopBar;
-@synthesize isTesting, adExtras;
+@synthesize isTesting, adExtras, userId;
 
 @synthesize bannerIsVisible, bannerIsInitialized;
 @synthesize bannerShow, autoShow, autoShowBanner, autoShowInterstitial, autoShowRewardVideo;
@@ -47,7 +47,8 @@ @implementation CDVAdMob
 #define DEFAULT_INTERSTITIAL_ID @"ca-app-pub-3940256099942544/4411468910"
 #define DEFAULT_REWARD_VIDEO_ID @"ca-app-pub-3940256099942544/1712485313"
 
-#define OPT_PUBLISHER_ID    @"publisherId"
+#define OPT_USER_ID       @"userId"
+#define OPT_BANNER_AD_ID    @"bannerAdId"
 #define OPT_INTERSTITIAL_ADID   @"interstitialAdId"
 #define OPT_REWARD_VIDEO_ID   @"rewardVideoId"
 #define OPT_AD_SIZE         @"adSize"
@@ -98,6 +99,7 @@ - (void)pluginInitialize {
 
     gender = nil;
     forChild = nil;
+    userId = @"";
 
     isRewardedVideoLoading = false;
     rewardedVideoLock = nil;
@@ -404,6 +406,8 @@ - (void) __cycleRewardVideo {
                 self.rewardVideoView = [GADRewardBasedVideoAd sharedInstance];
                 self.rewardVideoView.delegate = self;
 
+                NSLog(@"userId for rewardedVideo is %@", self.userId);
+                [GADRewardBasedVideoAd sharedInstance].userIdentifier = self.userId;
                 [self.rewardVideoView loadRequest:[GADRequest request] withAdUnitID:self.rewardVideoId];
             }
         }
@@ -463,7 +467,7 @@ - (void) __setOptions:(NSDictionary*) options {
 
     NSString* str = nil;
 
-    str = [options objectForKey:OPT_PUBLISHER_ID];
+    str = [options objectForKey:OPT_BANNER_AD_ID];
     if (str && [str length] > 0) {
         publisherId = str;
     }
@@ -507,7 +511,12 @@ - (void) __setOptions:(NSDictionary*) options {
     if (dict) {
         adExtras = dict;
     }
-
+    
+    str = [options objectForKey:OPT_USER_ID];
+    if (str) {
+        userId = str;
+    }
+    
     str = [options objectForKey:OPT_AUTO_SHOW];
     if (str) {
         autoShow = [str boolValue];