diff --git a/CHANGELOG.md b/CHANGELOG.md
index d971052d..f99d188a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 5.0.2
++ Replaced obfuscatedAccountIdAndroid with obfuscatedAccountId in request purchase method [#299](https://github.com/dooboolab/flutter_inapp_purchase/pull/299)
+
 ## 5.0.1
 + Add AndroidProrationMode values [#273](https://github.com/dooboolab/flutter_inapp_purchase/pull/273)
 
diff --git a/ios/Classes/FlutterInappPurchasePlugin.m b/ios/Classes/FlutterInappPurchasePlugin.m
index 881e1768..ce168a38 100644
--- a/ios/Classes/FlutterInappPurchasePlugin.m
+++ b/ios/Classes/FlutterInappPurchasePlugin.m
@@ -70,6 +70,7 @@ - (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
         }
     } else if ([@"buyProduct" isEqualToString:call.method]) {
         NSString* identifier = (NSString*)call.arguments[@"sku"];
+        NSString* usernameHash = (NSString*)call.arguments[@"forUser"];
         SKProduct *product;
 
         for (SKProduct *p in validProducts) {
@@ -80,6 +81,7 @@ - (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
         }
         if (product) {
             SKMutablePayment *payment = [SKMutablePayment paymentWithProduct:product];
+            payment.applicationUsername = usernameHash;
             [[SKPaymentQueue defaultQueue] addPayment:payment];
         } else {
             NSDictionary *err = [NSDictionary dictionaryWithObjectsAndKeys:
diff --git a/lib/flutter_inapp_purchase.dart b/lib/flutter_inapp_purchase.dart
index db62630b..80fe0acb 100644
--- a/lib/flutter_inapp_purchase.dart
+++ b/lib/flutter_inapp_purchase.dart
@@ -99,7 +99,6 @@ class FlutterInappPurchase {
   ///
   /// `iOS` also returns subscriptions.
   Future<List<IAPItem>> getProducts(List<String> skus) async {
-    if (skus == null || skus.contains(null)) return [];
     skus = skus.toList();
     if (_platform.isAndroid) {
       dynamic result = await _channel.invokeMethod(
@@ -128,7 +127,6 @@ class FlutterInappPurchase {
   ///
   /// `iOS` also returns non-subscription products.
   Future<List<IAPItem>> getSubscriptions(List<String> skus) async {
-    if (skus == null || skus.contains(null)) return [];
     skus = skus.toList();
     if (_platform.isAndroid) {
       dynamic result = await _channel.invokeMethod(
@@ -219,14 +217,14 @@ class FlutterInappPurchase {
 
   /// Request a purchase on `Android` or `iOS`.
   /// Result will be received in `purchaseUpdated` listener or `purchaseError` listener.
-  /// 
+  ///
   /// Check [AndroidProrationMode] for valid proration values
   /// Identical to [requestSubscription] on `iOS`.
   Future requestPurchase(
     String sku, {
-    String? obfuscatedAccountIdAndroid,
-    String? obfuscatedProfileIdAndroid,
+    String? obfuscatedAccountId,
     String? purchaseTokenAndroid,
+    String? obfuscatedProfileIdAndroid,
   }) async {
     if (_platform.isAndroid) {
       return await _channel.invokeMethod('buyItemByType', <String, dynamic>{
@@ -234,13 +232,14 @@ class FlutterInappPurchase {
         'sku': sku,
         'oldSku': null,
         'prorationMode': -1,
-        'obfuscatedAccountId': obfuscatedAccountIdAndroid,
+        'obfuscatedAccountId': obfuscatedAccountId,
         'obfuscatedProfileId': obfuscatedProfileIdAndroid,
         'purchaseToken': purchaseTokenAndroid,
       });
     } else if (_platform.isIOS) {
       return await _channel.invokeMethod('buyProduct', <String, dynamic>{
         'sku': sku,
+        'forUser': obfuscatedAccountId,
       });
     }
     throw PlatformException(
@@ -251,7 +250,7 @@ class FlutterInappPurchase {
   /// Result will be received in `purchaseUpdated` listener or `purchaseError` listener.
   ///
   /// **NOTICE** second parameter is required on `Android`.
-  /// 
+  ///
   /// Check [AndroidProrationMode] for valid proration values
   /// Identical to [requestPurchase] on `iOS`.
   Future requestSubscription(
@@ -506,7 +505,6 @@ class FlutterInappPurchase {
     Duration duration: const Duration(days: 30),
     Duration grace: const Duration(days: 3),
   }) async {
-    assert(sku != null);
     if (_platform.isIOS) {
       var history =
           await (getPurchaseHistory() as FutureOr<List<PurchasedItem>>);
@@ -548,9 +546,6 @@ class FlutterInappPurchase {
     required Map<String, String> receiptBody,
     bool isTest = true,
   }) async {
-    assert(receiptBody != null);
-    assert(isTest != null);
-
     final String url = isTest
         ? 'https://sandbox.itunes.apple.com/verifyReceipt'
         : 'https://buy.itunes.apple.com/verifyReceipt';
@@ -587,11 +582,6 @@ class FlutterInappPurchase {
     required String accessToken,
     bool isSubscription = false,
   }) async {
-    assert(packageName != null);
-    assert(productId != null);
-    assert(productToken != null);
-    assert(accessToken != null);
-
     final String type = isSubscription ? 'subscriptions' : 'products';
     final String url =
         'https://www.googleapis.com/androidpublisher/v3/applications/$packageName/purchases/$type/$productId/tokens/$productToken?access_token=$accessToken';
@@ -642,7 +632,7 @@ class FlutterInappPurchase {
           throw new ArgumentError('Unknown method ${call.method}');
       }
       return Future.value(null);
-    } as Future<dynamic> Function(MethodCall)?);
+    });
   }
 
   Future _removePurchaseListener() async {
@@ -663,7 +653,7 @@ class FlutterInappPurchase {
 
 /// A list of valid values for ProrationMode parameter
 /// https://developer.android.com/reference/com/android/billingclient/api/BillingFlowParams.ProrationMode
-class AndroidProrationMode{
+class AndroidProrationMode {
   /// Replacement takes effect when the old plan expires, and the new price will be charged at the same time.
   /// https://developer.android.com/reference/com/android/billingclient/api/BillingFlowParams.ProrationMode#DEFERRED
   static const int DEFERRED = 4;
@@ -682,4 +672,4 @@ class AndroidProrationMode{
 
   /// https://developer.android.com/reference/com/android/billingclient/api/BillingFlowParams.ProrationMode#unknown_subscription_upgrade_downgrade_policy
   static const int UNKNOWN_SUBSCRIPTION_UPGRADE_DOWNGRADE_POLICY = 0;
-}
\ No newline at end of file
+}
diff --git a/lib/modules.dart b/lib/modules.dart
index 15ee3f2f..51a490bf 100644
--- a/lib/modules.dart
+++ b/lib/modules.dart
@@ -56,11 +56,14 @@ class IAPItem {
             json['introductoryPriceNumberOfPeriodsIOS'] as String?,
         introductoryPriceSubscriptionPeriodIOS =
             json['introductoryPriceSubscriptionPeriodIOS'] as String?,
-        introductoryPriceNumberIOS = json['introductoryPriceNumberIOS'] as String?,
+        introductoryPriceNumberIOS =
+            json['introductoryPriceNumberIOS'] as String?,
         subscriptionPeriodNumberIOS =
             json['subscriptionPeriodNumberIOS'] as String?,
-        subscriptionPeriodUnitIOS = json['subscriptionPeriodUnitIOS'] as String?,
-        subscriptionPeriodAndroid = json['subscriptionPeriodAndroid'] as String?,
+        subscriptionPeriodUnitIOS =
+            json['subscriptionPeriodUnitIOS'] as String?,
+        subscriptionPeriodAndroid =
+            json['subscriptionPeriodAndroid'] as String?,
         introductoryPriceCyclesAndroid =
             json['introductoryPriceCyclesAndroid'] as int?,
         introductoryPricePeriodAndroid =
@@ -93,13 +96,18 @@ class IAPItem {
 
     data['subscriptionPeriodNumberIOS'] = this.subscriptionPeriodNumberIOS;
     data['subscriptionPeriodUnitIOS'] = this.subscriptionPeriodUnitIOS;
-    data['introductoryPricePaymentModeIOS'] = this.introductoryPricePaymentModeIOS;
-    data['introductoryPriceNumberOfPeriodsIOS'] = this.introductoryPriceNumberOfPeriodsIOS;
-    data['introductoryPriceSubscriptionPeriodIOS'] = this.introductoryPriceSubscriptionPeriodIOS;
+    data['introductoryPricePaymentModeIOS'] =
+        this.introductoryPricePaymentModeIOS;
+    data['introductoryPriceNumberOfPeriodsIOS'] =
+        this.introductoryPriceNumberOfPeriodsIOS;
+    data['introductoryPriceSubscriptionPeriodIOS'] =
+        this.introductoryPriceSubscriptionPeriodIOS;
 
     data['subscriptionPeriodAndroid'] = this.subscriptionPeriodAndroid;
-    data['introductoryPriceCyclesAndroid'] = this.introductoryPriceCyclesAndroid;
-    data['introductoryPricePeriodAndroid'] = this.introductoryPricePeriodAndroid;
+    data['introductoryPriceCyclesAndroid'] =
+        this.introductoryPriceCyclesAndroid;
+    data['introductoryPricePeriodAndroid'] =
+        this.introductoryPricePeriodAndroid;
     data['freeTrialPeriodAndroid'] = this.freeTrialPeriodAndroid;
     data['signatureAndroid'] = this.signatureAndroid;
 
@@ -133,8 +141,7 @@ class IAPItem {
         'iconUrl: $iconUrl, '
         'originalJson: $originalJson, '
         'originalPrice: $originalPrice, '
-        'discounts: $discountsIOS, '
-    ;
+        'discounts: $discountsIOS, ';
   }
 
   static List<DiscountIOS>? _extractDiscountIOS(dynamic json) {
@@ -144,12 +151,12 @@ class IAPItem {
     if (list != null) {
       discounts = list
           .map<DiscountIOS>(
-            (dynamic discount) => DiscountIOS.fromJSON(discount as Map<String, dynamic>),
-      )
+            (dynamic discount) =>
+                DiscountIOS.fromJSON(discount as Map<String, dynamic>),
+          )
           .toList();
     }
 
-
     return discounts;
   }
 }
@@ -194,8 +201,7 @@ class DiscountIOS {
         'price: $price, '
         'localizedPrice: $localizedPrice, '
         'paymentMode: $paymentMode, '
-        'subscriptionPeriod: $subscriptionPeriod, '
-    ;
+        'subscriptionPeriod: $subscriptionPeriod, ';
   }
 }
 
@@ -229,7 +235,6 @@ class PurchasedItem {
         transactionReceipt = json['transactionReceipt'] as String?,
         purchaseToken = json['purchaseToken'] as String?,
         orderId = json['orderId'] as String?,
-
         dataAndroid = json['dataAndroid'] as String?,
         signatureAndroid = json['signatureAndroid'] as String?,
         isAcknowledgedAndroid = json['isAcknowledgedAndroid'] as bool?,
@@ -237,7 +242,6 @@ class PurchasedItem {
         purchaseStateAndroid =
             _decodePurchaseStateAndroid(json['purchaseStateAndroid'] as int?),
         originalJsonAndroid = json['originalJsonAndroid'] as String?,
-
         originalTransactionDateIOS =
             _extractDate(json['originalTransactionDateIOS']),
         originalTransactionIdentifierIOS =
@@ -254,6 +258,7 @@ class PurchasedItem {
         'transactionReceipt: $transactionReceipt, '
         'purchaseToken: $purchaseToken, '
         'orderId: $orderId, '
+
         /// android specific
         'dataAndroid: $dataAndroid, '
         'signatureAndroid: $signatureAndroid, '
@@ -261,6 +266,7 @@ class PurchasedItem {
         'autoRenewingAndroid: $autoRenewingAndroid, '
         'purchaseStateAndroid: $purchaseStateAndroid, '
         'originalJsonAndroid: $originalJsonAndroid, '
+
         /// ios specific
         'originalTransactionDateIOS: ${originalTransactionDateIOS?.toIso8601String()}, '
         'originalTransactionIdentifierIOS: $originalTransactionIdentifierIOS, '
@@ -286,7 +292,7 @@ class PurchaseResult {
     this.responseCode,
     this.debugMessage,
     this.code,
-    this.message
+    this.message,
   });
 
   PurchaseResult.fromJSON(Map<String, dynamic> json)
@@ -296,23 +302,21 @@ class PurchaseResult {
         message = json['message'] as String?;
 
   Map<String, dynamic> toJson() => {
-    "responseCode": responseCode ?? 0,
-    "debugMessage": debugMessage ?? '',
-    "code": code ?? '',
-    "message": message ?? '',
-  };
+        "responseCode": responseCode ?? 0,
+        "debugMessage": debugMessage ?? '',
+        "code": code ?? '',
+        "message": message ?? '',
+      };
 
   @override
   String toString() {
     return 'responseCode: $responseCode, '
         'debugMessage: $debugMessage, '
         'code: $code, '
-        'message: $message'
-    ;
+        'message: $message';
   }
 }
 
-
 class ConnectionResult {
   final bool? connected;
 
@@ -324,13 +328,12 @@ class ConnectionResult {
       : connected = json['connected'] as bool?;
 
   Map<String, dynamic> toJson() => {
-    "connected": connected ?? false,
-  };
+        "connected": connected ?? false,
+      };
 
   @override
   String toString() {
-    return 'connected: $connected'
-    ;
+    return 'connected: $connected';
   }
 }
 
diff --git a/pubspec.yaml b/pubspec.yaml
index efb5d77f..2a6309c5 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,9 +1,9 @@
 name: flutter_inapp_purchase
 description: In App Purchase plugin for flutter. This project has been forked by react-native-iap and we are willing to share same experience with that on react-native.
-version: 5.0.1
+version: 5.0.2
 homepage: https://github.com/dooboolab/flutter_inapp_purchase/blob/master/pubspec.yaml
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=2.0.0 <3.0.0"
 
 dependencies:
@@ -20,7 +20,6 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
 
-
 # For information on the generic Dart part of this file, see the
 # following page: https://www.dartlang.org/tools/pub/pubspec
 
@@ -33,7 +32,6 @@ flutter:
         pluginClass: FlutterInappPurchasePlugin
       ios:
         pluginClass: FlutterInappPurchasePlugin
-
   # To add assets to your plugin package, add an assets section, like this:
   # assets:
   #  - images/a_dot_burr.jpeg
@@ -44,7 +42,6 @@ flutter:
   #
   # An image asset can refer to one or more resolution-specific "variants", see
   # https://flutter.io/assets-and-images/#resolution-aware.
-
   # To add custom fonts to your plugin package, add a fonts section here,
   # in this "flutter" section. Each entry in this list should have a
   # "family" key with the font family name, and a "fonts" key with a
diff --git a/test/flutter_inapp_purchase_test.dart b/test/flutter_inapp_purchase_test.dart
index 79be4848..2a8aa0f6 100644
--- a/test/flutter_inapp_purchase_test.dart
+++ b/test/flutter_inapp_purchase_test.dart
@@ -910,6 +910,7 @@ void main() {
         };
 
         final String sku = "testsku";
+        final String forUser = "testObfuscatedUser";
 
         setUp(() {
           FlutterInappPurchase(FlutterInappPurchase.private(
@@ -927,12 +928,16 @@ void main() {
         });
 
         test('invokes correct method', () async {
-          await FlutterInappPurchase.instance.requestPurchase(sku);
+          await FlutterInappPurchase.instance.requestPurchase(
+            sku,
+            obfuscatedAccountId: forUser,
+          );
           expect(log, <Matcher>[
             isMethodCall(
               'buyProduct',
               arguments: <String, dynamic>{
                 'sku': sku,
+                'forUser': forUser,
               },
             ),
           ]);
@@ -1063,6 +1068,7 @@ void main() {
       group('for iOS', () {
         final List<MethodCall> log = <MethodCall>[];
         final String sku = "testsku";
+        final String forUser = "testObfuscatedUser";
         final dynamic result = {
           "transactionDate": "1552824902000",
           "transactionId": "testTransactionId",
@@ -1093,12 +1099,16 @@ void main() {
         });
 
         test('invokes correct method', () async {
-          await FlutterInappPurchase.instance.requestPurchase(sku);
+          await FlutterInappPurchase.instance.requestPurchase(
+            sku,
+            obfuscatedAccountId: forUser,
+          );
           expect(log, <Matcher>[
             isMethodCall(
               'buyProduct',
               arguments: <String, dynamic>{
                 'sku': sku,
+                'forUser': forUser,
               },
             ),
           ]);