diff --git a/chat/client-libraries/cloud/get-space-notification-setting-user-cred.js b/chat/client-libraries/cloud/get-space-notification-setting-user-cred.js
index f0097421..fb2ee986 100644
--- a/chat/client-libraries/cloud/get-space-notification-setting-user-cred.js
+++ b/chat/client-libraries/cloud/get-space-notification-setting-user-cred.js
@@ -17,97 +17,27 @@
 
 // [START chat_get_space_notification_setting_user_cred]
 
-const fs = require('fs').promises;
-const path = require('path');
-const process = require('process');
-const {authenticate} = require('@google-cloud/local-auth');
-const {ChatServiceClient} = require('@google-apps/chat');
-const {auth} = require('google-auth-library');
+import {createClientWithUserCredentials} from './authentication-utils.js';
 
-// If modifying these scopes, delete token.json.
-const SCOPES = ['https://www.googleapis.com/auth/chat.users.spacesettings'];
+const USER_AUTH_OAUTH_SCOPES = ['https://www.googleapis.com/auth/chat.users.spacesettings'];
 
-// The file token.json stores the user's access and refresh tokens, and is
-// created automatically when the authorization flow completes for the first
-// time.
-const TOKEN_PATH = path.join(process.cwd(), 'token.json');
-const CREDENTIALS_PATH = path.join(process.cwd(), 'credentials.json');
-
-/**
- * Reads previously authorized credentials from the save file.
- *
- * @return {Promise<OAuth2Client|null>}
- */
-async function loadSavedCredentialsIfExist() {
-  try {
-    const content = await fs.readFile(TOKEN_PATH);
-    const credentials = JSON.parse(content);
-    return auth.fromJSON(credentials);
-  } catch (err) {
-    console.log(err);
-    return null;
-  }
-}
-
-/**
- * Serializes credentials to a file compatible with GoogleAuth.fromJSON.
- *
- * @param {OAuth2Client} client
- * @return {Promise<void>}
- */
-async function saveCredentials(client) {
-  const content = await fs.readFile(CREDENTIALS_PATH);
-  const keys = JSON.parse(content);
-  const key = keys.installed || keys.web;
-  const payload = JSON.stringify({
-    type: 'authorized_user',
-    client_id: key.client_id,
-    client_secret: key.client_secret,
-    refresh_token: client.credentials.refresh_token,
-  });
-  await fs.writeFile(TOKEN_PATH, payload);
-}
-
-/**
- * Load or request or authorization to call APIs.
- *
- * @return {Promise<OAuth2Client>}
- */
-async function authorize() {
-  let client = await loadSavedCredentialsIfExist();
-  if (client) {
-    return client;
-  }
-  client = await authenticate({
-    scopes: SCOPES,
-    keyfilePath: CREDENTIALS_PATH,
-  });
-  if (client.credentials) {
-    await saveCredentials(client);
-  }
-  return client;
-}
-
-/**
- * Gets space notification settings with user credential.
- * @param {OAuth2Client} authClient An authorized OAuth2 client.
- */
-async function getSpaceNotificationSetting(authClient) {
+// This sample shows how to get the space notification setting for the calling user
+async function main() {
   // Create a client
-  const chatClient = new ChatServiceClient({
-    authClient: authClient,
-    scopes: SCOPES,
-  });
+  const chatClient = await createClientWithUserCredentials(USER_AUTH_OAUTH_SCOPES);
 
-  // Initialize request argument(s)
+  // Initialize request argument(s), replace the SPACE_NAME with an actual space name.
   const request = {
-    name : 'users/me/spaces/AAAA1XmS6pY/spaceNotificationSetting'
+    name : 'users/me/spaces/SPACE_NAME/spaceNotificationSetting'
   };
 
   // Make the request
-  const result = await chatClient.getSpaceNotificationSetting(request);
+  const response = await chatClient.getSpaceNotificationSetting(request);
 
-  console.log(result)
+  // Handle the response
+  console.log(response);
 }
 
-authorize().then(getSpaceNotificationSetting).catch(console.error);
+main().catch(console.error);
+
+// [END chat_get_space_notification_setting_user_cred]
\ No newline at end of file
diff --git a/chat/client-libraries/cloud/package.json b/chat/client-libraries/cloud/package.json
index 0fa9c2a2..3af8cc8b 100644
--- a/chat/client-libraries/cloud/package.json
+++ b/chat/client-libraries/cloud/package.json
@@ -40,6 +40,7 @@
     "get-message-user-cred.js": "node ./get-message-user-cred.js",
     "get-space-app-cred.js": "node ./get-space-app-cred.js",
     "get-space-event-user-cred.js": "node ./get-space-event-user-cred.js",
+    "get-space-notification-setting-user-cred.js": "node ./get-space-notification-setting-user-cred.js",
     "get-space-user-cred.js": "node ./get-space-user-cred.js",
     "get-space-read-state-user-cred.js": "node ./get-space-read-state-user-cred.js",
     "get-thread-read-state-user-cred.js": "node ./get-thread-read-state-user-cred.js",
@@ -47,6 +48,7 @@
     "update-membership-user-cred.js": "node ./update-membership-user-cred.js",
     "update-message-app-cred.js": "node ./update-message-app-cred.js",
     "update-message-user-cred.js": "node ./update-message-user-cred.js",
+    "update-space-notification-setting-user-cred.js": "node ./update-space-notification-setting-user-cred.js",
     "update-space-read-state-user-cred.js": "node ./update-space-read-state-user-cred.js",
     "update-space-user-cred.js": "node ./update-space-user-cred.js",
     "list-memberships-app-cred.js": "node ./list-memberships-app-cred.js",
diff --git a/chat/client-libraries/cloud/update-space-notification-setting-user-cred.js b/chat/client-libraries/cloud/update-space-notification-setting-user-cred.js
index 6fc85bd6..a07f4478 100644
--- a/chat/client-libraries/cloud/update-space-notification-setting-user-cred.js
+++ b/chat/client-libraries/cloud/update-space-notification-setting-user-cred.js
@@ -17,102 +17,32 @@
 
 // [START chat_update_space_notification_setting_user_cred]
 
-const fs = require('fs').promises;
-const path = require('path');
-const process = require('process');
-const {authenticate} = require('@google-cloud/local-auth');
-const {ChatServiceClient} = require('@google-apps/chat');
-const {auth} = require('google-auth-library');
+import {createClientWithUserCredentials} from './authentication-utils.js';
 
-// If modifying these scopes, delete token.json.
-const SCOPES = ['https://www.googleapis.com/auth/chat.users.spacesettings'];
+const USER_AUTH_OAUTH_SCOPES = ['https://www.googleapis.com/auth/chat.users.spacesettings'];
 
-// The file token.json stores the user's access and refresh tokens, and is
-// created automatically when the authorization flow completes for the first
-// time.
-const TOKEN_PATH = path.join(process.cwd(), 'token.json');
-const CREDENTIALS_PATH = path.join(process.cwd(), 'credentials.json');
-
-/**
- * Reads previously authorized credentials from the save file.
- *
- * @return {Promise<OAuth2Client|null>}
- */
-async function loadSavedCredentialsIfExist() {
-  try {
-    const content = await fs.readFile(TOKEN_PATH);
-    const credentials = JSON.parse(content);
-    return auth.fromJSON(credentials);
-  } catch (err) {
-    console.log(err);
-    return null;
-  }
-}
-
-/**
- * Serializes credentials to a file compatible with GoogleAuth.fromJSON.
- *
- * @param {OAuth2Client} client
- * @return {Promise<void>}
- */
-async function saveCredentials(client) {
-  const content = await fs.readFile(CREDENTIALS_PATH);
-  const keys = JSON.parse(content);
-  const key = keys.installed || keys.web;
-  const payload = JSON.stringify({
-    type: 'authorized_user',
-    client_id: key.client_id,
-    client_secret: key.client_secret,
-    refresh_token: client.credentials.refresh_token,
-  });
-  await fs.writeFile(TOKEN_PATH, payload);
-}
-
-/**
- * Load or request or authorization to call APIs.
- *
- * @return {Promise<OAuth2Client>}
- */
-async function authorize() {
-  let client = await loadSavedCredentialsIfExist();
-  if (client) {
-    return client;
-  }
-  client = await authenticate({
-    scopes: SCOPES,
-    keyfilePath: CREDENTIALS_PATH,
-  });
-  if (client.credentials) {
-    await saveCredentials(client);
-  }
-  return client;
-}
-
-/**
- * Updates space notification settings with user credential.
- * @param {OAuth2Client} authClient An authorized OAuth2 client.
- */
-async function updateSpaceNotificationSetting(authClient) {
+// This sample shows how to update the space notification setting for the calling user
+async function main() {
   // Create a client
-  const chatClient = new ChatServiceClient({
-    authClient: authClient,
-    scopes: SCOPES,
-  });
+  const chatClient = await createClientWithUserCredentials(USER_AUTH_OAUTH_SCOPES);
 
-  // Initialize request argument(s)
+  // Initialize request argument(s), replace the SPACE_NAME with an actual space name.
   const request = {
     spaceNotificationSetting : {
-    	name : 'users/me/spaces/AAAA1XmS6pY/spaceNotificationSetting',
+    	name : 'users/me/spaces/SPACE_NAME/spaceNotificationSetting',
     	notificationSetting : 'ALL',
     	muteSetting : 'UNMUTED'
     },
     updateMask : { paths: ['notification_setting','mute_setting']}
   };
-  
+
   // Make the request
-  const result = await chatClient.updateSpaceNotificationSetting(request);
+  const response = await chatClient.updateSpaceNotificationSetting(request);
 
-  console.log(result)
+  // Handle the response
+  console.log(response);
 }
 
-authorize().then(updateSpaceNotificationSetting).catch(console.error);
+main().catch(console.error);
+
+// [END chat_update_space_notification_setting_user_cred]
\ No newline at end of file