diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index c2fb4a985..fc6bfb6da 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1,3 +1,3 @@
 # See https://help.github.com/en/articles/about-code-owners
 
-@rakutentech/miniapp-technology
+* @rakutentech/miniapp-technology
diff --git a/.github/pull_request_template b/.github/pull_request_template
index 004a4abf9..321601e3d 100644
--- a/.github/pull_request_template
+++ b/.github/pull_request_template
@@ -6,4 +6,4 @@ Explain your rationale of technical decisions you made (unless discussed before)
 Add links to github/jira issues, design documents and other relevant resources (e.g. previous discussions, platform/tool documentation etc.)
 
 # Checklist
-- [ ] I have completed all steps in the [Contribution Checklist](../.github/CONTRIBUTING.md#checklist)
+- [ ] I have completed all steps in the [Contribution Checklist](../blob/master.github/CONTRIBUTING.md#checklist)
diff --git a/js-miniapp-sample/src/pages/auth-token.js b/js-miniapp-sample/src/pages/auth-token.js
index 1dfbc84d5..d6fa0d235 100644
--- a/js-miniapp-sample/src/pages/auth-token.js
+++ b/js-miniapp-sample/src/pages/auth-token.js
@@ -6,7 +6,6 @@ import {
   FormGroup,
   Typography,
   CardContent,
-  ListItemText,
   FormControl,
   TextField,
 } from '@material-ui/core';
@@ -19,6 +18,7 @@ import {
   CustomPermissionName,
   CustomPermissionStatus,
   AccessTokenData,
+  MiniAppError,
 } from 'js-miniapp-sdk';
 import { connect } from 'react-redux';
 
@@ -70,37 +70,45 @@ const useStyles = makeStyles((theme) => ({
 const initialState = {
   isLoading: false,
   isError: false,
-  hasRequestedPermissions: false,
   error: null,
+  permissionDenied: false,
 };
 
 const dataFetchReducer = (state, action) => {
   switch (action.type) {
-    case 'FETCH_INIT':
+    case 'TOKEN_FETCH_INIT':
       return {
         ...state,
         isLoading: true,
         isError: false,
-        hasRequestedPermissions: false,
         error: null,
+        permissionDenied: false,
       };
-    case 'FETCH_SUCCESS':
+    case 'TOKEN_FETCH_SUCCESS':
       return {
         ...state,
         isLoading: false,
         isError: false,
-        hasRequestedPermissions: true,
         error: null,
+        permissionDenied: false,
       };
-    case 'FETCH_FAILURE':
+    case 'TOKEN_FETCH_FAILURE':
       return {
         ...state,
         isLoading: false,
         isError: true,
         error:
-          (typeof action.miniAppError == 'string'
-            ? action.miniAppError
-            : action.miniAppError.message) || '',
+          (typeof action.error == 'string'
+            ? action.error
+            : action.error.message) || '',
+      };
+    case 'PERMISSION_FAILURE':
+      return {
+        ...state,
+        isLoading: false,
+        isError: false,
+        error: null,
+        permissionDenied: true,
       };
     default:
       throw new Error();
@@ -110,6 +118,7 @@ const dataFetchReducer = (state, action) => {
 type AuthTokenProps = {
   permissions: CustomPermissionName[],
   accessToken: AccessTokenData,
+  error: MiniAppError,
   getAccessToken: (audience: string, scopes: string[]) => Promise<string>,
   requestPermissions: (
     permissions: CustomPermission[]
@@ -152,19 +161,17 @@ function AuthToken(props: AuthTokenProps) {
                 permission.status === CustomPermissionStatus.ALLOWED
             )
             .map((permission) => permission.name);
+          if (!hasPermission(CustomPermissionName.ACCESS_TOKEN, permissions)) {
+            requestAccessToken();
+          } else {
+            dispatch({ type: 'PERMISSION_FAILURE', permissionDenied: true });
+          }
+        } else {
+          dispatch({ type: 'PERMISSION_FAILURE', permissionDenied: true });
         }
       })
-      .then((permissions) =>
-        Promise.all([
-          hasPermission(CustomPermissionName.ACCESS_TOKEN, permissions)
-            ? props.getAccessToken(scope.audience, scope.scopes)
-            : null,
-        ])
-      )
-      .then(() => dispatch({ type: 'FETCH_SUCCESS' }))
-      .catch((miniAppError) => {
-        console.error(miniAppError);
-        dispatch({ type: 'FETCH_FAILURE', miniAppError });
+      .catch((error) => {
+        dispatch({ type: 'PERMISSION_FAILURE', permissionDenied: true });
       });
   }
 
@@ -173,10 +180,21 @@ function AuthToken(props: AuthTokenProps) {
     return permissionList.indexOf(permission) > -1;
   }
 
+  function requestAccessToken() {
+    props
+      .getAccessToken(scope.audience, scope.scopes)
+      .then((permissions) => {
+        dispatch({ type: 'TOKEN_FETCH_SUCCESS' });
+      })
+      .catch((e) => {
+        dispatch({ type: 'TOKEN_FETCH_FAILURE', error: e });
+      });
+  }
+
   function handleClick(e) {
     if (!state.isLoading) {
       e.preventDefault();
-      dispatch({ type: 'FETCH_INIT' });
+      dispatch({ type: 'TOKEN_FETCH_INIT' });
       requestAccessTokenPermission();
     }
   }
@@ -201,19 +219,6 @@ function AuthToken(props: AuthTokenProps) {
     );
   }
 
-  function AccessToken() {
-    const hasDeniedPermission =
-      state.hasRequestedPermissions &&
-      !hasPermission(CustomPermissionName.ACCESS_TOKEN);
-
-    return hasDeniedPermission ? (
-      <ListItemText
-        primary="Access Token permission is denied by the user."
-        className={classes.red}
-      />
-    ) : null;
-  }
-
   return (
     <GreyCard height="auto">
       <CardContent>
@@ -239,30 +244,41 @@ function AuthToken(props: AuthTokenProps) {
             </FormControl>
           </Fragment>
           {ButtonWrapper()}
-          {!state.isLoading && !state.isError && props.accessToken && (
-            <Typography variant="body1" className={classes.success}>
-              Token: {props.accessToken.token}
-            </Typography>
-          )}
-          {!state.isLoading && !state.isError && props.accessToken && (
-            <Typography variant="body1" className={classes.success}>
-              Valid until: {displayDate(props.accessToken.validUntil)}
+          {!state.isLoading &&
+            !state.isError &&
+            !state.permissionDenied &&
+            props.accessToken && (
+              <Typography variant="body1" className={classes.success}>
+                Token: {props.accessToken.token}
+              </Typography>
+            )}
+          {!state.isLoading &&
+            !state.isError &&
+            !state.permissionDenied &&
+            props.accessToken && (
+              <Typography variant="body1" className={classes.success}>
+                Valid until: {displayDate(props.accessToken.validUntil)}
+              </Typography>
+            )}
+          {!state.isLoading && state.isError && !state.permissionDenied && (
+            <Typography variant="body1" className={classes.red}>
+              {state.error}
             </Typography>
           )}
-          {!state.isLoading && state.isError && (
+          {!state.isLoading && state.permissionDenied && (
             <Typography variant="body1" className={classes.red}>
-              Something went wrong, please try again later.
+              ACCESS_TOKEN Permission is denied by the user
             </Typography>
           )}
-          <div>{AccessToken()}</div>
         </FormGroup>
       </CardContent>
     </GreyCard>
   );
 }
 
-const mapStateToProps = (state) => {
+const mapStateToProps = (state, props) => {
   return {
+    ...props,
     permissions: state.permissions,
     accessToken: state.user.accessToken,
     error: state.error,
diff --git a/js-miniapp-sample/src/services/permissions/actions.js b/js-miniapp-sample/src/services/permissions/actions.js
index 09ac1e95c..d89c6a44c 100644
--- a/js-miniapp-sample/src/services/permissions/actions.js
+++ b/js-miniapp-sample/src/services/permissions/actions.js
@@ -1,6 +1,7 @@
 import MiniApp, {
   CustomPermission,
   CustomPermissionResult,
+  MiniAppError,
 } from 'js-miniapp-sdk';
 
 import {
@@ -8,9 +9,10 @@ import {
   REQUEST_PERMISSIONS_FAILURE,
 } from './types';
 
-type PermissionsSuccessAction = {
+type PermissionsAction = {
   type: String,
   permissions: CustomPermissionResult[],
+  error: MiniAppError
 };
 
 const requestCustomPermissions = (
@@ -26,13 +28,14 @@ const requestCustomPermissions = (
 
         return permissions;
       })
-      .catch((_) => {
+      .catch((e) => {
         dispatch({
           type: REQUEST_PERMISSIONS_FAILURE,
+          error: e,
         });
       });
   };
 };
 
 export { requestCustomPermissions };
-export type { PermissionsSuccessAction };
+export type { PermissionsAction };
diff --git a/js-miniapp-sample/src/services/permissions/reducers.js b/js-miniapp-sample/src/services/permissions/reducers.js
index c07d4bf5d..9f319b469 100644
--- a/js-miniapp-sample/src/services/permissions/reducers.js
+++ b/js-miniapp-sample/src/services/permissions/reducers.js
@@ -1,13 +1,23 @@
 import { CustomPermissionName, CustomPermissionStatus } from 'js-miniapp-sdk';
 
-import type { PermissionsSuccessAction } from './actions';
-import { REQUEST_PERMISSIONS_SUCCESS } from './types';
+import type { PermissionsAction } from './actions';
+import { REQUEST_PERMISSIONS_SUCCESS, REQUEST_PERMISSIONS_FAILURE } from './types';
 
-const defaultState: CustomPermissionName[] = [];
+type PermissionsState = {
+  type: REQUEST_PERMISSIONS_FAILURE,
+  permissions: CustomPermissionResult[],
+  error: MiniAppError
+};
+
+const defaultState: PermissionsState = {
+  type: undefined,
+  permissions: [],
+  error: null
+};
 
-const grantedPermissionsReducer = (
+const PermissionsReducer = (
   state: CustomPermissionName[] = defaultState,
-  action: PermissionsSuccessAction
+  action: PermissionsAction
 ): CustomPermissionName[] => {
   switch (action.type) {
     case REQUEST_PERMISSIONS_SUCCESS:
@@ -17,15 +27,23 @@ const grantedPermissionsReducer = (
       const allowed = action.permissions
         .filter((it) => it.status === CustomPermissionStatus.ALLOWED)
         .map((it) => it.name);
-
-      const array = state
+      const array = state.permissions
         .concat(allowed)
         .filter((permission) => denied.indexOf(permission) <= -1);
 
-      return Array.from(new Set(array));
+      return {
+        type: REQUEST_PERMISSIONS_SUCCESS,
+        permissions: array,
+        error: action.error,
+      };
+    case REQUEST_PERMISSIONS_FAILURE:
+      return {
+        ...defaultState,
+        error: action.error,
+      };
     default:
       return state;
   }
 };
 
-export { grantedPermissionsReducer };
+export { PermissionsReducer };
diff --git a/js-miniapp-sample/src/services/reducers.js b/js-miniapp-sample/src/services/reducers.js
index a30921048..78b6516e9 100644
--- a/js-miniapp-sample/src/services/reducers.js
+++ b/js-miniapp-sample/src/services/reducers.js
@@ -7,7 +7,7 @@ import {
   SecureStorageStatusReducer,
 } from './landing/reducers';
 import MessageReducer from './message/reducers';
-import { grantedPermissionsReducer } from './permissions/reducers';
+import { PermissionsReducer } from './permissions/reducers';
 import storageReducer from './secure-storage/reducers';
 import userReducer from './user/reducers';
 import { UUIDReducer } from './uuid/reducers';
@@ -15,7 +15,7 @@ import { UUIDReducer } from './uuid/reducers';
 export default combineReducers({
   message: MessageReducer,
   home: HomeStateReducer,
-  permissions: grantedPermissionsReducer,
+  permissions: PermissionsReducer,
   user: userReducer,
   uuid: UUIDReducer,
   info: HostEnvironmentInfoReducer,