Display email with the Google oAuth2 - php

Question

I am using google oauth and i couldnt print out the email, i may be missing something here. any help would be appreciated.
require_once 'google-api-php-client/src/Google_Client.php';
require_once 'google-api-php-client/src/contrib/Google_PlusService.php';
session_start();
$client = new Google_Client();
$client->setApplicationName("Google+ PHP Starter Application");
// Visit https://code.google.com/apis/console to generate your
// oauth2_client_id, oauth2_client_secret, and to register your oauth2_redirect_uri.
$client->setClientId('xxxx');
$client->setClientSecret('xxxx');
$client->setRedirectUri('xxxx');
$client->setDeveloperKey('xxxx');
$client->setScopes(array('https://www.googleapis.com/auth/userinfo.email',
'https://www.googleapis.com/auth/userinfo.profile',
'https://www.googleapis.com/auth/plus.me' ));
$plus = new Google_PlusService($client);
if (isset($_REQUEST['logout'])) {
unset($_SESSION['access_token']);
//header('Location:index.php');
}
if (isset($_GET['code'])) {
$client->authenticate($_GET['code']);
$_SESSION['access_token'] = $client->getAccessToken();
header('Location: http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF']);
}
if (isset($_SESSION['access_token'])) {
$client->setAccessToken($_SESSION['access_token']);
}
else
{
header("location: index.php");
}
if ($client->getAccessToken()) {
$me = $plus->people->get('me');
$url = filter_var($me['url'], FILTER_VALIDATE_URL);
$img = filter_var($me['image']['url'], FILTER_VALIDATE_URL);
$name = filter_var($me['displayName'], FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_HIGH);
$personMarkup = "<a rel='me' href='$url' style=;color:#FDB900;>$name</a>&nbsp<img src='$img' style='width:6%'>";
$_SESSION['access_token'] = $client->getAccessToken();
} else {
$authUrl = $client->createAuthUrl();
}
the above is my php. i've been able to print out the name, image of the user but i need especially the email.