diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 593892c..22ed22b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -25,5 +25,5 @@ jobs:
       - run: npm test
       - run: npm run test:integration
         env:
-          SECRET_KEY: xnd_development_chBDpzjQZEI8nncBLrWtwau5r7rgiuunCJ4JCqsd68rXemDd74BnRpdO0bIZAMK
+          SECRET_KEY: xnd_development_oI7I6slPeYIxZPyfNxVIQt6R0JxiXGIRTBxBw5Ij26rjUwUeF29Aa9wHSETkM3
           SECRET_KEY_PH: xnd_development_Va7pPIfYxIo7letKqhZCkwniwggDGyjB0sAzmOUe1mMkED4k0nLh1TvtVi0raNne
diff --git a/README.md b/README.md
index de6e2fb..ef967fa 100644
--- a/README.md
+++ b/README.md
@@ -16,106 +16,106 @@ For PCI compliance to be maintained, tokenization of credit cards info should be
 - [API Documentation](#api-documentation)
 - [Installation](#installation)
 - [Usage](#usage)
-  * [Card Services](#card-services)
-    + [Create charge](#create-charge)
-    + [Capture charge](#capture-charge)
-    + [Get charge](#get-charge)
-    + [Create authorization](#create-authorization)
-    + [Reverse authorization](#reverse-authorization)
-    + [Create refund](#create-refund)
-    + [Create promotion](#create-promotion)
-  * [Virtual Account Services](#virtual-account-services)
-    + [Get banks with available virtual account service](#get-banks-with-available-virtual-account-service)
-    + [Create a fixed virtual account](#create-a-fixed-virtual-account)
-    + [Get details of your fixed virtual account](#get-details-of-your-fixed-virtual-account)
-    + [Update details of your fixed virtual account](#update-details-of-your-fixed-virtual-account)
-    + [Get details of a VA payment](#get-details-of-a-va-payment)
-  * [Disbursement Services](#disbursement-services)
-    + [Get banks with available disbursement service](#get-banks-with-available-disbursement-service)
-    + [Create a disbursement](#create-a-disbursement)
-    + [Create a batch of disbursements](#create-a-batch-of-disbursements)
-    + [Get a disbursement by ID](#get-a-disbursement-by-id)
-  * [Invoice Services](#invoice-services)
-    + [Create an invoice](#create-an-invoice)
-    + [Get an invoice](#get-an-invoice)
-    + [Expire an invoice](#expire-an-invoice)
-    + [Get all invoices](#get-all-invoices)
-  * [Recurring Payments Services](#recurring-payments-services)
-    + [Create recurring payment](#create-recurring-payment)
-    + [Get recurring payment](#get-recurring-payment)
-    + [Edit recurring payment](#edit-recurring-payment)
-    + [Stop recurring payment](#stop-recurring-payment)
-    + [Pause recurring payment](#pause-recurring-payment)
-    + [Resume recurring payment](#resume-recurring-payment)
-  * [Recurring Services](#recurring-services)
-    + [Create recurring schedule](#create-recurring-schedule)
-    + [Edit recurring schedule](#edit-recurring-schedule)
-    + [Get recurring schedule](#get-recurring-schedule)
-    + [Create recurring plan](#create-recurring-plan)
-    + [Create recurring plan with schedule](#create-recurring-plan-with-schedule)
-    + [Edit recurring plan](#edit-recurring-plan)
-    + [Get recurring plan](#get-recurring-plan)
-    + [Deactivate recurring plan](#deactivate-recurring-plan)
-    + [Edit recurring cycle](#edit-recurring-cycle)
-    + [Get recurring cycle](#get-recurring-cycle)
-    + [Get all recurring cycles](#get-all-recurring-cycles)
-    + [Cancel recurring cycle](#cancel-recurring-cycle)
-  * [Payout Services](#payout-services)
-    + [Create a payout](#create-a-payout)
-    + [Get a payout](#get-a-payout)
-    + [Void a payout](#void-a-payout)
-  * [EWallet Services](#ewallet-services)
-    + [Create payment](#create-payment)
-    + [Get payment](#get-payment)
-    + [Create an ewallet charge](#create-an-ewallet-charge)
-    + [Get an ewallet charge status](#get-an-ewallet-charge-status)
-    + [Void an ewallet charge](#void-an-ewallet-charge)
-    + [Initialize tokenization](#initialize-tokenization)
-    + [Unlink tokenization](#unlink-tokenization)
-    + [Create payment method (E-Wallet)](#create-payment-method-e-wallet)
-    + [Get payment methods by customer ID (E-Wallet)](#get-payment-methods-by-customer-id-e-wallet)
-  * [Balance Services](#balance-services)
-    + [Get balance](#get-balance)
-  * [Retail Outlet Services](#retail-outlet-services)
-    + [Create fixed payment code](#create-fixed-payment-code)
-    + [Get fixed payment code](#get-fixed-payment-code)
-    + [Get payments by fixed payment code ID](#get-payments-by-fixed-payment-code-id)
-    + [Update fixed payment code](#update-fixed-payment-code)
-    + [Simulate payment for RO (only in dev mode)](#simulate-payment-for-ro-only-in-dev-mode)
-  * [QR Code Services](#qr-code-services)
-    + [Create code](#create-code)
-    + [Get code](#get-code)
-    + [Simulate payment for QR (only in dev mode)](#simulate-payment-for-qr-only-in-dev-mode)
-    + [Get payments by external ID](#get-payments-by-external-id)
-  * [Customer services](#customer-services)
-    + [Create customer](#create-customer)
-    + [Get customer](#get-customer)
-    + [Get customer by reference ID](#get-customer-by-reference-id)
-    + [Update customer](#update-customer)
-  * [Direct debit services](#direct-debit-services)
-    + [Initialize linked account tokenization](#initialize-linked-account-tokenization)
-    + [Validate OTP for Linked Account Token](#validate-otp-for-linked-account-token)
-    + [Retrieve accessible accounts by linked account token](#retrieve-accessible-accounts-by-linked-account-token)
-    + [Create payment method (Direct Debit)](#create-payment-method-direct-debit)
-    + [Get payment methods by customer ID (Direct Debit)](#get-payment-methods-by-customer-id-direct-debit)
-    + [Create direct debit payment](#create-direct-debit-payment)
-    + [Validate OTP for direct debit payment](#validate-otp-for-direct-debit-payment)
-    + [Get direct debit payment status by ID](#get-direct-debit-payment-status-by-id)
-    + [Get direct debit payment status by reference ID](#get-direct-debit-payment-status-by-reference-id)
-  * [Report Service](#report-service)
-    + [Generate Report](#generate-report)
-    + [Get Report](#get-report)
-  * [Transaction Service](#transaction-service)
-    + [Get Transaction](#get-transaction)
-    + [List Transactions](#list-transactions)
-  * [XenPlatform Service](#xenplatform-service)
-    + [Create sub-account](#create-sub-account)
-    + [Create sub-account using V2](#create-sub-account-using-v2)
-    + [Get sub-account by ID](#get-sub-account-by-id)
-    + [Update sub-account](#update-sub-account)
-    + [Set Callback URL](#set-callback-url)
-    + [Create transfers](#create-transfers)
-    + [Create fee rules](#create-fee-rules)
+  - [Card Services](#card-services)
+    - [Create charge](#create-charge)
+    - [Capture charge](#capture-charge)
+    - [Get charge](#get-charge)
+    - [Create authorization](#create-authorization)
+    - [Reverse authorization](#reverse-authorization)
+    - [Create refund](#create-refund)
+    - [Create promotion](#create-promotion)
+  - [Virtual Account Services](#virtual-account-services)
+    - [Get banks with available virtual account service](#get-banks-with-available-virtual-account-service)
+    - [Create a fixed virtual account](#create-a-fixed-virtual-account)
+    - [Get details of your fixed virtual account](#get-details-of-your-fixed-virtual-account)
+    - [Update details of your fixed virtual account](#update-details-of-your-fixed-virtual-account)
+    - [Get details of a VA payment](#get-details-of-a-va-payment)
+  - [Disbursement Services](#disbursement-services)
+    - [Get banks with available disbursement service](#get-banks-with-available-disbursement-service)
+    - [Create a disbursement](#create-a-disbursement)
+    - [Create a batch of disbursements](#create-a-batch-of-disbursements)
+    - [Get a disbursement by ID](#get-a-disbursement-by-id)
+  - [Invoice Services](#invoice-services)
+    - [Create an invoice](#create-an-invoice)
+    - [Get an invoice](#get-an-invoice)
+    - [Expire an invoice](#expire-an-invoice)
+    - [Get all invoices](#get-all-invoices)
+  - [Recurring Payments Services](#recurring-payments-services)
+    - [Create recurring payment](#create-recurring-payment)
+    - [Get recurring payment](#get-recurring-payment)
+    - [Edit recurring payment](#edit-recurring-payment)
+    - [Stop recurring payment](#stop-recurring-payment)
+    - [Pause recurring payment](#pause-recurring-payment)
+    - [Resume recurring payment](#resume-recurring-payment)
+  - [Recurring Services](#recurring-services)
+    - [Create recurring schedule](#create-recurring-schedule)
+    - [Edit recurring schedule](#edit-recurring-schedule)
+    - [Get recurring schedule](#get-recurring-schedule)
+    - [Create recurring plan](#create-recurring-plan)
+    - [Create recurring plan with schedule](#create-recurring-plan-with-schedule)
+    - [Edit recurring plan](#edit-recurring-plan)
+    - [Get recurring plan](#get-recurring-plan)
+    - [Deactivate recurring plan](#deactivate-recurring-plan)
+    - [Edit recurring cycle](#edit-recurring-cycle)
+    - [Get recurring cycle](#get-recurring-cycle)
+    - [Get all recurring cycles](#get-all-recurring-cycles)
+    - [Cancel recurring cycle](#cancel-recurring-cycle)
+  - [Payout Services](#payout-services)
+    - [Create a payout](#create-a-payout)
+    - [Get a payout](#get-a-payout)
+    - [Void a payout](#void-a-payout)
+  - [EWallet Services [SOON TO BE DEPRECATED - MAR 31 2022]](#ewallet-services-soon-to-be-deprecated---mar-31-2022)
+    - [Create payment](#create-payment)
+    - [Get payment](#get-payment)
+    - [Create an ewallet charge](#create-an-ewallet-charge)
+    - [Get an ewallet charge status](#get-an-ewallet-charge-status)
+    - [Void an ewallet charge](#void-an-ewallet-charge)
+    - [Initialize tokenization](#initialize-tokenization)
+    - [Unlink tokenization](#unlink-tokenization)
+    - [Create payment method (E-Wallet)](#create-payment-method-e-wallet)
+    - [Get payment methods by customer ID (E-Wallet)](#get-payment-methods-by-customer-id-e-wallet)
+  - [Balance Services](#balance-services)
+    - [Get balance](#get-balance)
+  - [Retail Outlet Services](#retail-outlet-services)
+    - [Create fixed payment code](#create-fixed-payment-code)
+    - [Get fixed payment code](#get-fixed-payment-code)
+    - [Get payments by fixed payment code ID](#get-payments-by-fixed-payment-code-id)
+    - [Update fixed payment code](#update-fixed-payment-code)
+    - [Simulate payment for RO (only in dev mode)](#simulate-payment-for-ro-only-in-dev-mode)
+  - [QR Code Services](#qr-code-services)
+    - [Create code](#create-code)
+    - [Get code](#get-code)
+    - [Simulate payment for QR (only in dev mode)](#simulate-payment-for-qr-only-in-dev-mode)
+    - [Get payments by external ID](#get-payments-by-external-id)
+  - [Customer services](#customer-services)
+    - [Create customer](#create-customer)
+    - [Get customer](#get-customer)
+    - [Get customer by reference ID](#get-customer-by-reference-id)
+    - [Update customer](#update-customer)
+  - [Direct debit services](#direct-debit-services)
+    - [Initialize linked account tokenization](#initialize-linked-account-tokenization)
+    - [Validate OTP for Linked Account Token](#validate-otp-for-linked-account-token)
+    - [Retrieve accessible accounts by linked account token](#retrieve-accessible-accounts-by-linked-account-token)
+    - [Create payment method (Direct Debit)](#create-payment-method-direct-debit)
+    - [Get payment methods by customer ID (Direct Debit)](#get-payment-methods-by-customer-id-direct-debit)
+    - [Create direct debit payment](#create-direct-debit-payment)
+    - [Validate OTP for direct debit payment](#validate-otp-for-direct-debit-payment)
+    - [Get direct debit payment status by ID](#get-direct-debit-payment-status-by-id)
+    - [Get direct debit payment status by reference ID](#get-direct-debit-payment-status-by-reference-id)
+  - [Report Service](#report-service)
+    - [Generate Report](#generate-report)
+    - [Get Report](#get-report)
+  - [Transaction Service](#transaction-service)
+    - [Get Transaction](#get-transaction)
+    - [List Transactions](#list-transactions)
+  - [XenPlatform Service](#xenplatform-service)
+    - [Create sub-account](#create-sub-account)
+    - [Create sub-account using V2](#create-sub-account-using-v2)
+    - [Get sub-account by ID](#get-sub-account-by-id)
+    - [Update sub-account](#update-sub-account)
+    - [Set Callback URL](#set-callback-url)
+    - [Create transfers](#create-transfers)
+    - [Create fee rules](#create-fee-rules)
 - [Contributing](#contributing)
 
 <!-- tocstop -->
@@ -636,6 +636,7 @@ rp.pausePayment(data: { id: string })
 ```ts
 rp.resumePayment(data: { id: string })
 ```
+
 ### Recurring Services
 
 Instantiate Recurring service using constructor that has been injected with Xendit keys
@@ -743,6 +744,7 @@ r.createPlan(data: {
 ```
 
 #### Create recurring plan with schedule
+
 ```ts
 r.createPlan(data: {
   businessId: string;
@@ -879,7 +881,10 @@ p.getPayout(data: { id: string })
 p.voidPayout(data: { id: string })
 ```
 
-### EWallet Services
+### EWallet Services [SOON TO BE DEPRECATED - MAR 31 2022]
+
+Deprecation notice here: <https://docs.xendit.co/api-deprecation/2019-ewallet>
+We will continue working on developing the SDK to support the new EWallet service
 
 Instanitiate EWallet service using constructor that has been injected with Xendit keys
 
@@ -1440,14 +1445,14 @@ Example: Getting a transaction
 
 ```js
 t.getTransaction({
-  id: "txn_123"
+  id: 'txn_123',
 })
   .then(res => {
     console.log('Get Transaction:', res);
   })
   .catch(e => {
     console.error(`Get Transaction Failed with Error: ${e.message}`);
-  })
+  });
 ```
 
 #### Get Transaction
diff --git a/examples/with_async/card.js b/examples/with_async/card.js
index 21f381c..c2a4709 100644
--- a/examples/with_async/card.js
+++ b/examples/with_async/card.js
@@ -5,8 +5,18 @@ const card = new Card({});
 
 // These IDs should be obtained using Xendit.js
 // https://docs.xendit.co/xenpayments/payments-credit-cards-overview/credit-cards-integration-and-testing/collecting-card-details-tokenization/index.html
-const tokenID = '5e0461a86113354249aab7ec';
-const authID = '5e0461a96113354249aab7ee';
+// You can generate sample token/authentication data and replace it below
+// https://js.xendit.co/test_tokenize.html
+// https://js.xendit.co/test_authenticate.html
+const tokenID = '623d394d672113001b79c1a1';
+const authID = '623d394d672113001b79c1a2';
+
+function sleepFor(sleepDuration) {
+  var now = new Date().getTime();
+  while (new Date().getTime() < now + sleepDuration) {
+    /* Do nothing */
+  }
+}
 
 (async function() {
   try {
@@ -24,14 +34,16 @@ const authID = '5e0461a96113354249aab7ee';
     console.log('charge created:', charge); // eslint-disable-line no-console
 
     const capture = await card.captureCharge({
-      chargeID: id,
+      chargeID: charge.id,
       amount: 10000,
     });
     console.log('charge captured:', capture); // eslint-disable-line no-console
 
+    sleepFor(3000);
+
     const refund = await card.createRefund({
-      chargeID: id,
-      externalID: external_id,
+      chargeID: charge.id,
+      externalID: charge.external_id,
       amount: 5000,
     });
     console.log('refund created:', refund); // eslint-disable-line no-console
@@ -45,8 +57,8 @@ const authID = '5e0461a96113354249aab7ee';
       currency: 'IDR',
       minOriginalAmount: 25000,
       maxDiscountAmount: 5000,
-      startTime: '2022-03-25T00:00:00.000Z',
-      endTime: '2022-05-25T00:00:00.000Z',
+      startTime: '2022-01-25T00:00:00.000Z',
+      endTime: '2023-01-25T00:00:00.000Z',
     });
     // eslint-disable-next-line max-len
     console.log('promotion created:', promotion); // eslint-disable-line no-console
diff --git a/examples/with_async/customer.js b/examples/with_async/customer.js
index 535ae8e..085e914 100644
--- a/examples/with_async/customer.js
+++ b/examples/with_async/customer.js
@@ -31,28 +31,6 @@ const c = new Customer({});
     });
     // eslint-disable-next-line no-console
     console.log('retrieved customers', customers);
-
-    customer = await c.updateCustomer({
-      id: customer.id,
-      description: 'customer dummy',
-      phoneNumber: '+628987654321',
-      nationality: 'ID',
-      dateOfBirth: '2000-06-13',
-      addresses: [
-        {
-          streetLine1: 'jalan raya',
-          country: 'ID',
-          city: 'Jakarta',
-        },
-        {
-          streetLine1: 'jalan raya 2',
-          country: 'ID',
-          city: 'Jakarta',
-        },
-      ],
-      apiVersion: '2020-05-19',
-    });
-    console.log('updated customer', customer); //eslint-disable-line no-console
   } catch (e) {
     console.error(e); // eslint-disable-line no-console
     process.exit(1);
diff --git a/examples/with_async/direct_debit.js b/examples/with_async/direct_debit.js
index a284d87..c35b9f6 100644
--- a/examples/with_async/direct_debit.js
+++ b/examples/with_async/direct_debit.js
@@ -15,6 +15,7 @@ const c = new Customer({});
       middleName: 'middle',
       surname: 'surname',
       addresses: [],
+      apiVersion: '2020-05-19',
     });
 
     let tokenization = await dd.initializeTokenization({
diff --git a/examples/with_async/platform.js b/examples/with_async/platform.js
index eb50383..5f2d081 100644
--- a/examples/with_async/platform.js
+++ b/examples/with_async/platform.js
@@ -27,7 +27,7 @@ const p = new Platform({});
     const transfer = await p.createTransfer({
       reference: `example+${Date.now().toString()}`,
       amount: 1,
-      sourceUserID: '5df358652ebad7084a70ac6c',
+      sourceUserID: '623d3cda7012f7478e9a7e69',
       destinationUserID: account.user_id,
     });
 
diff --git a/examples/with_promises/card.js b/examples/with_promises/card.js
index 0dae7d2..96adbb5 100644
--- a/examples/with_promises/card.js
+++ b/examples/with_promises/card.js
@@ -5,8 +5,18 @@ const card = new Card({});
 
 // These IDs should be obtained using Xendit.js
 // https://docs.xendit.co/xenpayments/payments-credit-cards-overview/credit-cards-integration-and-testing/collecting-card-details-tokenization/index.html
-const tokenID = '5e0461a86113354249aab7ec';
-const authID = '5e0461a96113354249aab7ee';
+// You can generate sample token/authentication data and replace it below
+// https://js.xendit.co/test_tokenize.html
+// https://js.xendit.co/test_authenticate.html
+const tokenID = '6201f056382ab2001b4bc3d6';
+const authID = '6205f8dcca71c0001bc26ae6';
+
+function sleepFor(sleepDuration) {
+  var now = new Date().getTime();
+  while (new Date().getTime() < now + sleepDuration) {
+    /* Do nothing */
+  }
+}
 
 card
   .createCharge({
@@ -29,6 +39,7 @@ card
   )
   .then(r => {
     console.log('charge captured:', r); // eslint-disable-line no-console
+    sleepFor(3000);
     return r;
   })
   .then(({ id, external_id }) =>
diff --git a/examples/with_promises/customer.js b/examples/with_promises/customer.js
index 2cd0b06..928dbc3 100644
--- a/examples/with_promises/customer.js
+++ b/examples/with_promises/customer.js
@@ -33,32 +33,6 @@ c.createCustomer({
     console.log('retrieved customers', r); // eslint-disable-line no-console
     return r[0];
   })
-  .then(r =>
-    c.updateCustomer({
-      id: r.id,
-      description: 'customer dummy',
-      phoneNumber: '+628987654321',
-      nationality: 'ID',
-      dateOfBirth: '2000-06-13',
-      addresses: [
-        {
-          streetLine1: 'jalan raya',
-          country: 'ID',
-          city: 'Jakarta',
-        },
-        {
-          streetLine1: 'jalan raya 2',
-          country: 'ID',
-          city: 'Jakarta',
-        },
-      ],
-      apiVersion: '2020-05-19',
-    }),
-  )
-  .then(r => {
-    console.log('updated customer', r); // eslint-disable-line no-console
-    return r;
-  })
   .catch(e => {
     console.error(e); // eslint-disable-line no-console
     process.exit(1);
diff --git a/examples/with_promises/direct_debit.js b/examples/with_promises/direct_debit.js
index 7458ee8..539b8c6 100644
--- a/examples/with_promises/direct_debit.js
+++ b/examples/with_promises/direct_debit.js
@@ -13,6 +13,7 @@ c.createCustomer({
   middleName: 'middle',
   surname: 'surname',
   addresses: [],
+  apiVersion: '2020-05-19',
 })
   .then(r =>
     dd.initializeTokenization({
diff --git a/integration_test/card.test.js b/integration_test/card.test.js
index 8e2067a..63fbf8c 100644
--- a/integration_test/card.test.js
+++ b/integration_test/card.test.js
@@ -2,10 +2,10 @@ const x = require('./xendit.test');
 
 const Card = x.Card;
 const card = new Card({});
-
+//  5e046a736113354249aab8bd old charge
 module.exports = function() {
   return card
-    .getCharge({ chargeID: '5e046a736113354249aab8bd' })
+    .getCharge({ chargeID: '623d397a360c32001b0aeeda' })
     .then(() =>
       card.createPromotion({
         referenceId: Date.now().toString(),
diff --git a/integration_test/customer.test.js b/integration_test/customer.test.js
index f615da7..d1b9a69 100644
--- a/integration_test/customer.test.js
+++ b/integration_test/customer.test.js
@@ -14,30 +14,10 @@ module.exports = function() {
       middleName: 'middle',
       surname: 'surname',
       addresses: [],
+      apiVersion: '2020-05-19',
     })
     .then(r => c.getCustomer({ id: r.id }))
     .then(r => c.getCustomerByReferenceID({ referenceID: r.reference_id }))
-    .then(r =>
-      c.updateCustomer({
-        id: r[0].id,
-        description: 'customer dummy',
-        phoneNumber: '+628987654321',
-        nationality: 'ID',
-        dateOfBirth: '2000-06-13',
-        addresses: [
-          {
-            streetLine1: 'jalan raya',
-            country: 'ID',
-            city: 'Jakarta',
-          },
-          {
-            streetLine1: 'jalan raya 2',
-            country: 'ID',
-            city: 'Jakarta',
-          },
-        ],
-      }),
-    )
     .then(() => {
       // eslint-disable-next-line no-console
       console.log('Customer integration test done...');
diff --git a/integration_test/direct_debit.test.js b/integration_test/direct_debit.test.js
index 59b7cd8..11107f0 100644
--- a/integration_test/direct_debit.test.js
+++ b/integration_test/direct_debit.test.js
@@ -15,6 +15,7 @@ module.exports = function() {
       middleName: 'middle',
       surname: 'surname',
       addresses: [],
+      apiVersion: '2020-05-19',
     })
     .then(r =>
       dd.initializeTokenization({
diff --git a/integration_test/index.js b/integration_test/index.js
index 2306225..7afb52f 100644
--- a/integration_test/index.js
+++ b/integration_test/index.js
@@ -8,7 +8,7 @@ Promise.all([
   require('./recurring.test')(),
   require('./balance.test')(),
   require('./retail_outlet.test')(),
-  require('./ewallet.test')(),
+  // require('./ewallet.test')(),
   require('./qr_code.test')(),
   require('./platform.test')(),
   require('./customer.test')(),
diff --git a/integration_test/platform.test.js b/integration_test/platform.test.js
index fabf5fc..863b4ae 100644
--- a/integration_test/platform.test.js
+++ b/integration_test/platform.test.js
@@ -12,19 +12,19 @@ module.exports = function() {
         businessName: `example+${Date.now().toString()}`,
       },
     })
-    .then(({ user_id }) =>
+    .then(r =>
       p.setCallbackURL({
-        forUserID: user_id,
+        forUserID: r.user_id,
         type: 'invoice',
         url: 'https://httpstat.us/200',
       }),
     )
-    .then(({ user_id }) =>
+    .then(r =>
       p.createTransfer({
         reference: `example+${Date.now().toString()}`,
         amount: 1,
-        sourceUserID: '5df358652ebad7084a70ac6c',
-        destinationUserID: user_id,
+        sourceUserID: '623d3cda7012f7478e9a7e69',
+        destinationUserID: r.user_id,
       }),
     )
     .then(() =>
diff --git a/package.json b/package.json
index bf4ced7..b94ff20 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "xendit-node",
-  "version": "1.21.0",
+  "version": "1.21.1",
   "description": "NodeJS client for Xendit API",
   "main": "index.js",
   "types": "index.d.ts",
@@ -10,7 +10,7 @@
     "lint": "eslint index.js ./**/*.{js,ts}",
     "lint:fix": "eslint index.js ./**/*.{js,ts} --fix",
     "format": "prettier --config .prettierrc --write index.js ./**/*.{js,json,ts}",
-    "gentoc": "markdown-toc -i README.md",
+    "gentoc": "markdown-toc -i --bullets=- README.md",
     "release": "np",
     "report": "nyc -r text -r lcov npm run test",
     "coveralls": "cat coverage/lcov.info | coveralls"
@@ -35,7 +35,7 @@
       "git add"
     ],
     "README.md": [
-      "markdown-toc -i",
+      "markdown-toc -i --bullets=-",
       "git add"
     ]
   },