Difficulties getting user's mail from Gmail inbox in Laravel

I'm trying to create a Laravel API to interact with Gmail via the Google API client library for PHP. However, I encounter issues with the endpoint to get mails.

So far, I could do authorization and get the access token in my DB. This endpoint return JSON of this format:

{
    "user_id": 1,
    "token": {
        "access_token": "ya29.XXXXXXXXXXXX-K_P9Z0Rd0nU5WzSvU3TMlC0TZQRbMLkDHE1XI3j29mbIRP13dt_NGMb4d9trTECGKiwbjM45Ijk7fbhpLzU2JL7w-6w_XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
        "expires_in": 3599,
        "scope": "https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/gmail.readonly",
        "token_type": "Bearer",
        "id_token": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX-yK6GHPRATk64GaPcYCuIVyqTYNNvfvr8gCVuTCKr3RMtUz5J97ROZkJRN5w_AQvyJFL369MNTnHQAiqJoPIN2Wes0OAbeq1urpDRMRaAfF6Nuqun-pmewI8g5OCjkUMqekZTKlzCqRl7Xkm4qQRrwk66SxwGdC78Iy5Z_3VG1OIj681zoY18dQu9_ZqGMnwVuHmffmzNInuAmqHcQ7CLM_I_vJbWV3-UKVRF2UtjHvmUydCdo4PrEpL371i8exwPme5IK_xMcywxdfdjxm4duyv6X_ky2MCYwANNBSyBLMYh214FZPowL8choHmMIms-biJlg",
        "created": 1647922921
    },
    "name": "gmail",
    "updated_at": "2022-03-22T04:22:01.000000Z",
    "created_at": "2022-03-22T04:22:01.000000Z",
    "id": 10
}

My second endpoint is to get the mails by using the access token.

My implementation looks like this.

    // Services
    public function getEMails($user_id, $access_token){
        $this->client->setAccessToken($access_token);
        $service = new Gmail($this->client);
        $messages = $service->users_messages->listUsersMessages($user_id);
        return $messages;
    }
   // Controller
    public function getMails(WebService $web_service, GmailServices $gmail_services){
        $access_token = $web_service->token['access_token'];
        $user_id = 'me';
        if (isset($access_token)){
            $mails = $gmail_services->getEMails($user_id, $access_token);
        }
        return $mails;
    }
  // api.php (In route middleware)
  Route::get('/web-service/{mails}', [WebServiceController::class, 'getMails'])->name('web-service.getMails');

Hitting this endpoint, I get the below error.

"message": "Trying to access array offset on value of type null", "exception": "ErrorException"

which corresponds to this line $access_token = $web_service->token['access_token'];

I did some minor research, but I couldn't resolve it. Unfortunately, I'm not advanced in Laravel development, and I'll appreciate any help and feedback.

Furthermore, I equally want to add that my implementation is largely based on Bitfumes test-driven API development on YouTube. Here is the link to the repo https://github.com/bitfumes/laravel-test-driven-api

Thanks!

After trying the above, I was expecting to get the mails and equally work on pagination or querying via LIMIT so that the backend will not over-stress to get all mails at once.

source https://stackoverflow.com/questions/71568199/difficulties-getting-users-mail-from-gmail-inbox-in-laravel