Error: Class 'DIY\Google_Service_Plus' not found

<?php
 
namespace DIY\Backend\Controllers;
 
use DIY\Google;
use DIY\Api\Models\User;
use Phalcon\Db\Column;
 
/**
 * @author Julien Turbide <jturbide@nuagerie.com>
 * @version 1.0.0
 */
class GoogleController extends AbstractController
{
    public function authAction() {
    
        $appUri = $this->request->getScheme() . '://' . $this->request->getHttpHost() . $this->config->application->baseUri;
        
        $google = new Google();
        $googleClient = $google->getClient();
        $googleClient->setRedirectUri($appUri . 'google/auth');
        
        if ($this->request->has('code')) {
            $googleClient->fetchAccessTokenWithAuthCode($this->request->get('code'));
            $googleAccessToken = $googleClient->getAccessToken();
            if (!empty($googleAccessToken)) {
                $googleClient->setAccessToken($googleAccessToken);
                $googleOauth = new \Google_Service_Oauth2($googleClient);
                $googleUserInfo = $googleOauth->userinfo->get();
                if (!empty($googleUserInfo->email) && $googleUserInfo->verifiedEmail) {
                    $user = User::findFirstWith(array('Roles', 'Googles'), array(
                        'email = :email:',
                        'bind' => array(
                            'email' => $this->filter->sanitize(isset($googleUserInfo->email) ? $googleUserInfo->email : '', 'string'),
                        ),
                        'bindTypes' => array(
                            'email' => Column::BIND_PARAM_STR
                        )
                    ));
                }
                
                if (empty($user) || !$user) {
                    $google = \DIY\Api\Models\Google::findFirstByGoogleId($this->filter->sanitize($googleUserInfo->id, 'int'));
                    if ($google && $google->checkToken($google->google_id)) {
                        $user = User::findFirstWith(array('Roles', 'Googles'), array(
                            'id = :id:',
                            'bind' => array(
                                'id' => $this->filter->sanitize(isset($google->user_id) ? $google->user_id : '', 'int'),
                            ),
                            'bindTypes' => array(
                                'email' => Column::BIND_PARAM_STR
                            )
                        ));
                    }
                }
                
                if (!empty($user) || $user) {
                    $this->session->set('user', $user);
                    $this->session->set('diy.google.accessToken', $googleAccessToken);
                    $this->session->set('diy.google.userInfo', (array) $googleUserInfo);
                }
                elseif (!empty($googleUserInfo->email)) {
                    $params = [
                        'email' => $googleUserInfo->email,
                        'first_name' => $googleUserInfo->givenName,
                        'last_name' => $googleUserInfo->familyName,
                    ];
                    return $this->response->redirect($this->url->get(['for' => 'backend-controller-action', 'controller' => 'login', 'action' => 'register']) . '?' . http_build_query($params));
                }
            }
            return $this->response->redirect($appUri, true);
        }
        else {
            $this->_logout();
            return $this->response->redirect($googleClient->createAuthUrl(), true);
        }
    }
    
    private function _logout() {
        $this->session->remove('diy.google.userInfo');
        $this->session->remove('diy.google.accessToken');
        $this->session->remove('user');
    }
}
 
 

<?php
 
use Phalcon\Mvc\Application;
use Phalcon\DI\FactoryDefault;
use DIY\Config\App;
use DIY\Config\Config;
use DIY\Config\Modules;
use DIY\Config\Router;
use DIY\Config\Loader;
use DIY\Config\Services;
 
// Command line xDebug necessity
if (php_sapi_name() === 'cli-server')
{
  $_GET['_url'] = $_SERVER['REQUEST_URI'];
}
 
class Bootstrap
{
    public $di;
    public $app;
    public $config;
//    public $loader;
    public $application;
    public $services;
    public $modules;
    
    public function __construct()
    {
        $opts = getopt('e:hp:m:hp:c:hp:a:hp:p:hp:');
        if (!empty($opts)) {
            define('BOOTSTRAP_CLI', true);
            $url = '/' . $opts['m'] . '/' . $opts['c'] . '/' . $opts['a'] . '/' . $opts['p'];
            $_GET['_url'] = $url;
            $_SERVER['REQUEST_URI'] = $url;
            define('APPLICATION_ENV', $opts['e']);
            define('APP_ENV', $opts['e']);
            define('ENV', $opts['e']);
        }
        
        $appPath = realpath(__DIR__ . '/../app') . '/';
        $configPath = $appPath . 'config/';
        
        require_once $configPath . 'App.php';
        require_once $configPath . 'Config.php';
        require_once $configPath . 'Modules.php';
        require_once $configPath . 'Router.php';
        require_once $configPath . 'Services.php';
        
        $this->di = new FactoryDefault();
        $this->app = new App();
        $this->config = new Config();
        $this->config->mergeEnvConfig();
        $this->app->debugApp($this->config->get('debug', false));
        $this->services = new Services($this->di, $this->config);
        $this->application = new Application($this->di);
        
        $this->modules = new Modules($this->application);
        $this->router = new Router(true, $this->application);
    
        $this->di['router'] = $this->router;
    }
    
    public function run() {
        if (isset($this->application)) {
            echo $this->application->handle()->getContent();
        }
        else {
            throw new \Exception('Application not found', 404);
        }
    }
}
 
$bootstrap = new Bootstrap();
$bootstrap->run();

<?php
 
use Phalcon\Mvc\Application;
use Phalcon\DI\FactoryDefault;
use DIY\Config\App;
use DIY\Config\Config;
use DIY\Config\Modules;
use DIY\Config\Router;
use DIY\Config\Loader;
use DIY\Config\Services;
 
// Command line xDebug necessity
if (php_sapi_name() === 'cli-server')
{
  $_GET['_url'] = $_SERVER['REQUEST_URI'];
}
 
class Bootstrap
{
    public $di;
    public $app;
    public $config;
//    public $loader;
    public $application;
    public $services;
    public $modules;
    
    public function __construct()
    {
        $opts = getopt('e:hp:m:hp:c:hp:a:hp:p:hp:');
        if (!empty($opts)) {
            define('BOOTSTRAP_CLI', true);
            $url = '/' . $opts['m'] . '/' . $opts['c'] . '/' . $opts['a'] . '/' . $opts['p'];
            $_GET['_url'] = $url;
            $_SERVER['REQUEST_URI'] = $url;
            define('APPLICATION_ENV', $opts['e']);
            define('APP_ENV', $opts['e']);
            define('ENV', $opts['e']);
        }
        
        $appPath = realpath(__DIR__ . '/../app') . '/';
        $configPath = $appPath . 'config/';
        
        require_once $configPath . 'App.php';
        require_once $configPath . 'Config.php';
        require_once $configPath . 'Modules.php';
        require_once $configPath . 'Router.php';
        require_once $configPath . 'Services.php';
        
        $this->di = new FactoryDefault();
        $this->app = new App();
        $this->config = new Config();
        $this->config->mergeEnvConfig();
        $this->app->debugApp($this->config->get('debug', false));
        $this->services = new Services($this->di, $this->config);
        $this->application = new Application($this->di);
        
        $this->modules = new Modules($this->application);
        $this->router = new Router(true, $this->application);
    
        $this->di['router'] = $this->router;
    }
    
    public function run() {
        if (isset($this->application)) {
            echo $this->application->handle()->getContent();
        }
        else {
            throw new \Exception('Application not found', 404);
        }
    }
}
 
$bootstrap = new Bootstrap();
$bootstrap->run();