Connecting to Google API v3

[dweb]

Hey all

 

I'm working on a script which needs to connect to the Google Calendar API, but when I run the code I get

Fatal error: Uncaught exception 'Google_Auth_Exception' with message 'Error refreshing the OAuth2 token, message: '{ "error" : "invalid_grant" }'' in /home/public_html/cal_test/google-api-php/src/Google/Auth/OAuth2.php:341 Stack trace: #0 /home/public_html/cal_test/google-api-php/src/Google/Auth/OAuth2.php(300): Google_Auth_OAuth2->refreshTokenRequest(Array) #1 /home/public_html/cal_test/google-api-php/src/Google/Auth/OAuth2.php(230): Google_Auth_OAuth2->refreshTokenWithAssertion() #2 /home/public_html/cal_test/google-api-php/src/Google/Service/Resource.php(171): Google_Auth_OAuth2->sign(Object(Google_Http_Request)) #3 /home/public_html/cal_test/google-api-php/src/Google/Service/Calendar.php(1133): Google_Service_Resource->call('list', Array, 'Google_Service_...') #4 /home/public_html/cal_test/index.php(34): Google_Service_Calendar_CalendarList_Resource->listCalendarList() #5 {main} thrown in /home/public_html/cal_test/google-api-php/src/Google/Auth/OAuth2.php on line 341

The code i'm using is

<?php

error_reporting(-1);
ini_set('display_errors', 'On');


require_once "google-api-php/src/Google/Client.php";
require_once "google-api-php/src/Google/Service/Calendar.php";


// Service Account info
$client_id = 'CLIENT_ID';
$service_account_name = 'EMAIL';
$key_file_location = 'FILE_LOC';

// Calendar id
$calName = 'CAL_ID';


$client = new Google_Client();
$client->setApplicationName("Calendar test");

$service = new Google_Service_Calendar($client);

$key = file_get_contents($key_file_location);
$cred = new Google_Auth_AssertionCredentials(
 $service_account_name,
 array('https://www.googleapis.com/auth/calendar.readonly'),
 $key
);

$client->setAssertionCredentials($cred);

$cals = $service->calendarList->listCalendarList();
//print_r($cals);
//exit;

$events = $service->events->listEvents($calName);

foreach ($events->getItems() as $event) {
 echo $event->getSummary();
}  
  ?>

i've spent serveral hours trying to locate a fix on Google, but so far i'm stuggling

 

Can anyone help me?

 

Thanks

[Adam]

Well it's obviously authentication related, given the mention of OAuth2. Plus the exception is called "Google_Auth_Exception". Hate to say it, but are you 100% the username and password are correct?