Api refresh token not getting refresh . please check code

My google login code

public function googleLogin(Request $request) {

    if (Auth::check()) {
        return redirect('/dashboard');
    }
    
    $google_oauthV2 = new \Google_Service_Oauth2($this->gClient);

    if ($request->get('code')){

        $this->gClient->authenticate($request->get('code'));

        $request->session()->put('token', $this->gClient->getAccessToken());
        
    }

    if ($request->session()->get('token')){

        $this->gClient->setAccessToken($request->session()->get('token'));
    }
  
    if ($this->gClient->getAccessToken()) {
      // Get the user's profile information
    $googleUserInfo = $google_oauthV2->userinfo->get();

    $googleUserId = $googleUserInfo->getId();
    $googleUserEmail = $googleUserInfo->getEmail();
    $googleUserName = $googleUserInfo->getName();

        $user = User::where('google_id', $googleUserId)->first();
    
        if (!$user) {
            // If user does not exist, create a new user
            $userEmail = $google_oauthV2->userinfo->get()->getEmail();
            $user = User::create([
                'google_id' => $googleUserId,
                'name' => $googleUserName, // Set a default name
                'email' => $googleUserEmail, // Use the user's email
                // Other user fields as needed
            ]);
        }
    
        // Update user's access token and save
        $user->access_token = json_encode($request->session()->get('token'));
        $user->save();

        // checking drive 

    //     Access Google Drive using the authenticated client
    // $driveService = new \Google_Service_Drive($this->gClient);

    // try {
    //     // List files in the user's Google Drive
    //     $files = $driveService->files->listFiles();

    //     // Process the files or perform any desired operations
    //     foreach ($files as $file) {
    //         echo "File Name: " . $file->name . "<br>";
    //     }

    //     // You can also upload, download, or manipulate files as needed
    // } catch (\Google_Service_Exception $e) {
    //     // Handle any errors that may occur
    //     echo "Error: " . $e->getMessage();
    // }
    // cecking Drive
    
        Auth::login($user);

        $user = Auth::user();

        // Retrieve folders associated with the user
        $user_payments = UserPayment::where('user_id', $user->id)->get();
        $folders = CreateFolder::where('user_id', $user->id)->get();
        // dd($folders);
        return view('admin.dashboard', compact('folders', 'user', 'user_payments')); // Redirect to the admin dashboard
    } else {
        // Handle the case when access token is not available
        // Redirect the user to the Google login URL
        $authUrl = $this->gClient->createAuthUrl();
        return redirect()->to($authUrl);
    }
}

My drive uploading code

public function googleDriveFileUploadOutSide(Request $request) { // Get the folder ID from the request input $folderId = $request->input('folder_id');

// Retrieve the CreateFolder model using the folder ID
$folder = CreateFolder::where('folder_id', $folderId)->firstOrFail();

// Get the user_id from the CreateFolder model
$userId = $folder->user_id;

// Retrieve the user using the user_id
$user = User::findOrFail($userId);

// Set the user's access token
$accessToken = json_decode($user->access_token, true);
$this->gClient->setAccessToken($accessToken);

// Initialize the Google Drive service
$service = new \Google_Service_Drive($this->gClient);

// Check if the access token is expired
if ($this->gClient->isAccessTokenExpired()) {
    // Refresh the access token
    
    $refreshToken = $this->gClient->getRefreshToken();
    $newAccessToken = $this->gClient->fetchAccessTokenWithRefreshToken($accessToken);

    // Update the user's access token in the database
    $user->access_token = json_encode($newAccessToken);
    $user->save();

    // Set the new access token
    $this->gClient->setAccessToken($newAccessToken);
}

// Loop through each uploaded file and upload it to Google Drive
foreach ($request->file('uploaded_files') as $file) {
    // Set the file metadata for Google Drive
    $fileMetadata = new \Google_Service_Drive_DriveFile([
        'name' => $file->getClientOriginalName(),
        'parents' => [$folderId], // Set the folder ID as the parent
    ]);

    // Upload the file
    $service->files->create(
        $fileMetadata,
        [
            'data' => file_get_contents($file),
            'mimeType' => $file->getClientMimeType(),
            'uploadType' => 'multipart',
        ]
    );

    // Store the file locally (if needed)
    $fileName = Str::slug(pathinfo($file->getClientOriginalName(), PATHINFO_FILENAME)) . uniqid() . '.' . $file->getClientOriginalExtension();
    $file->storeAs('public/uploads', $fileName);
    $file->move(public_path('uploads/'), $fileName);

    // Update the CreateFolder record with the new image (if needed)
    if ($request->has('id')) {
        $id = $request->id;
        $existingImages = $folder->images ? explode(',', $folder->images) : [];
        $existingImages[] = $fileName; // Add the new file to existing images
        $uniqueImageNames = array_unique($existingImages);
        $commaSeparatedFileNames = implode(',', $uniqueImageNames);
        $folder->images = $commaSeparatedFileNames;
        $folder->save();
    }
}

return redirect()->back()->with('success', 'Files uploaded successfully.');

}

i want to upload files to drive but it gives error after exipiring. sometimes it gives error of invalid token format but main concern is refreshing token. kindly help me