diff --git a/.eslintrc.cjs b/.eslintrc.cjs
index 31c02371b..f6ec0e777 100644
--- a/.eslintrc.cjs
+++ b/.eslintrc.cjs
@@ -50,6 +50,15 @@ module.exports = {
         'includeRoles': ['button']
       },
     ],
+    '@typescript-eslint/no-unused-vars': [
+      1,
+      {
+        vars: 'all',
+        varsIgnorePattern: '^_',
+        args: 'after-used',
+        argsIgnorePattern: '^_',
+      },
+    ],
   },
   settings: {
     react: {
diff --git a/src/components/Chat.tsx b/src/components/Chat.tsx
index 1cdd6add8..76a51dc94 100644
--- a/src/components/Chat.tsx
+++ b/src/components/Chat.tsx
@@ -41,8 +41,6 @@ const Chat = () => {
     stores.sdkStore.initialized,
   ]);
 
-
-
   const onBeforeSendMessage = <
     T extends UserMessageCreateParams | FileMessageCreateParams
   >(
diff --git a/src/const.ts b/src/const.ts
index 4bea88654..e7e64b01c 100644
--- a/src/const.ts
+++ b/src/const.ts
@@ -1,6 +1,4 @@
-import SendbirdChat, { SessionHandler } from '@sendbird/chat';
-import { type SendbirdGroupChat } from '@sendbird/chat/groupChannel';
-import { type SendbirdOpenChat } from '@sendbird/chat/openChannel';
+import { SessionHandler } from '@sendbird/chat';
 import React from 'react';
 
 import { StringSet } from '@uikit/ui/Label/stringSet';
@@ -67,9 +65,7 @@ export const DEFAULT_CONSTANT = {
   enableResetHistoryOnConnect: false,
 } satisfies Partial<Constant>;
 
-type ConfigureSession = (
-  sdk: SendbirdChat | SendbirdGroupChat | SendbirdOpenChat
-) => SessionHandler;
+type ConfigureSession = () => SessionHandler;
 
 type MessageData = {
   suggested_replies?: string[];
diff --git a/src/context/WidgetSettingContext.tsx b/src/context/WidgetSettingContext.tsx
index f4d3ea6e6..103438493 100644
--- a/src/context/WidgetSettingContext.tsx
+++ b/src/context/WidgetSettingContext.tsx
@@ -19,10 +19,10 @@ interface WidgetSession {
   strategy: 'auto' | 'manual';
   userId: string;
   expireAt: number;
-  // channelUrl is optional and is dynamically generated for a manual strategy.
-  channelUrl?: string;
   // sessionToken is optional and is dynamically generated by configureSession provided by the user for a manual strategy.
   sessionToken?: string;
+  // channelUrl is optional and is dynamically generated for a legacy manual strategy.
+  channelUrl?: string;
 }
 
 export interface BotStyle {
@@ -85,7 +85,9 @@ export const WidgetSettingProvider = ({
       botId,
     });
 
-    const reuseCachedSession = ((cache: typeof cachedSession): cache is NonNullable<typeof cachedSession> => {
+    const reuseCachedSession = ((
+      cache: typeof cachedSession
+    ): cache is NonNullable<typeof cachedSession> => {
       if (!cache || cache.strategy !== strategy) return false;
       if (cache.strategy === 'manual') {
         // NOTE: There is no need to check the expiration of the session if it is managed manually.
@@ -98,27 +100,49 @@ export const WidgetSettingProvider = ({
       return false;
     })(cachedSession);
 
-    const response = await getWidgetSetting({
+    const getConfigureSessionParams = async () => {
+      if (strategy !== 'manual') return undefined;
+
+      if (injectedUserId && configureSession && !reuseCachedSession) {
+        const sessionHandler = configureSession();
+        if (sessionHandler.onSessionTokenRequired) {
+          try {
+            const token = await new Promise(
+              sessionHandler.onSessionTokenRequired
+            );
+            if (token) return { userId: injectedUserId, sessionKey: token };
+          } catch {
+            // NO-OP
+          }
+        }
+      }
+      return undefined;
+    };
+
+    const widgetSettingParams = {
       host: apiHost,
       appId,
       botId,
-      createUserAndChannel: reuseCachedSession ? false : strategy === 'auto',
-    });
+      createUserAndChannel: !reuseCachedSession,
+      ...(await getConfigureSessionParams()),
+    };
+    const response = await getWidgetSetting(widgetSettingParams);
     setBotStyle(response.botStyle);
+
     if (reuseCachedSession) {
       setWidgetSession({
         strategy: sessionStrategy,
         userId: cachedSession.userId,
         expireAt: cachedSession.expireAt,
-        channelUrl: cachedSession.channelUrl,
         sessionToken: cachedSession.sessionToken,
+        channelUrl: cachedSession.channelUrl,
       });
     } else {
       if (sessionStrategy === 'auto' && response.user && response.channel) {
         const session = {
           strategy: sessionStrategy,
-          expireAt: response.user.expireAt,
           userId: response.user.userId,
+          expireAt: response.user.expireAt,
           sessionToken: response.user.sessionToken,
           channelUrl: response.channel.channelUrl,
         };
@@ -126,25 +150,38 @@ export const WidgetSettingProvider = ({
         saveWidgetSessionCache({ appId, botId, data: session });
       }
 
-      /**
-       * NOTE: We don't fully initialize the manual strategy session here.
-       * After the uikit is initialized, we should call the `initManualSession` function.
-       * */
       if (sessionStrategy === 'manual' && injectedUserId) {
-        const session = {
-          strategy: sessionStrategy,
-          userId: injectedUserId,
-          sessionToken: undefined,
-          channelUrl: undefined,
-          expireAt: 0,
-        };
-        setWidgetSession(session);
+        if (response.channel) {
+          const session = {
+            strategy: sessionStrategy,
+            userId: injectedUserId,
+            expireAt: getDateNDaysLater(30),
+            sessionToken: widgetSettingParams.sessionKey,
+            channelUrl: response.channel.channelUrl,
+          };
+          setWidgetSession(session);
+          saveWidgetSessionCache({ appId, botId, data: session });
+        } else {
+          /**
+           * TODO: Remove this after the widget_setting deployed to all region.
+           * NOTE: We don't fully initialize the legacy manual strategy session here.
+           *  After the uikit is initialized, we should call the `initManualSession` function.
+           * */
+          const session = {
+            strategy: sessionStrategy,
+            userId: injectedUserId,
+            expireAt: 0,
+            sessionToken: widgetSettingParams.sessionKey,
+            channelUrl: undefined,
+          };
+          setWidgetSession(session);
+        }
       }
     }
-
     setInitialized(true);
   }
 
+  // TODO: Remove this after the widget_setting deployed to all region.
   async function initManualSession(
     sdk: SendbirdChatWith<[GroupChannelModule]>
   ) {
@@ -163,9 +200,9 @@ export const WidgetSettingProvider = ({
 
       const session = {
         strategy: sessionStrategy,
-        expireAt: getDateNDaysLater(30),
         userId: injectedUserId,
-        sessionToken: undefined,
+        expireAt: getDateNDaysLater(30),
+        sessionToken: widgetSession?.sessionToken,
         channelUrl: channel.url,
       };
       setWidgetSession(session);
diff --git a/src/libs/api/widgetSetting.ts b/src/libs/api/widgetSetting.ts
index 43a14222f..5d75e5dc1 100644
--- a/src/libs/api/widgetSetting.ts
+++ b/src/libs/api/widgetSetting.ts
@@ -20,11 +20,19 @@ type APIResponse = {
   };
 };
 
-type Params = {
+interface Params extends ConfigureSessionParams {
   host: string;
   botId: string;
   appId: string;
   createUserAndChannel: boolean;
+}
+
+/**
+ * This is required to configure the session manually.
+ * */
+type ConfigureSessionParams = {
+  userId?: string;
+  sessionKey?: string;
 };
 
 type Response = {
@@ -50,17 +58,21 @@ export async function getWidgetSetting({
   botId,
   appId,
   createUserAndChannel,
+  userId,
+  sessionKey,
 }: Params): Promise<Response> {
-  const params = new URLSearchParams({
+  const headers = sessionKey ? { 'Session-Key': sessionKey } : undefined;
+  const params = asQueryParams({
     create_user_and_channel: createUserAndChannel ? 'True' : 'False',
-  }).toString();
+    user_id: createUserAndChannel && userId ? userId : undefined,
+  });
 
   const path = resolvePath(
     host,
     `/v3/bots/${botId}/${appId}/widget_setting?${params}`
   );
 
-  const response = await fetch(path);
+  const response = await fetch(path, { headers });
   const result = await response.json();
   if (!response.ok) {
     throw new Error(result.message || 'Something went wrong');
@@ -92,3 +104,10 @@ export async function getWidgetSetting({
       : undefined,
   };
 }
+
+function asQueryParams(obj: object) {
+  return Object.entries(obj)
+    .filter(([_, value]) => value !== undefined && value !== null)
+    .map(([key, value]) => `${key}=${value}`)
+    .join('&');
+}