Нужна помощь с подключением google api

set_include_path(get_include_path() . PATH_SEPARATOR . __DIR__ . '/google-api-php-client-master/src');

$client = new Google_Client();

Fatal error: Class 'Google_Client' not found in /Applications/MAMP/htdocs/scmail/scrap.php on line 7

Fatal error: Uncaught exception 'Google_Service_Exception' with message 'Error calling GET https://www.googleapis.com/books/v1/volumes?q=Henry+David+Thoreau&filter=free-ebooks&key=AIzaSyBcWVlzevHmHWpr_b_zaAK4AqXlbrf4144: (403) Access Not Configured. The API is not enabled for your project, or there is a per-IP or per-Referer restriction configured on your API key and the request does not match these restrictions. Please use the Google Developers Console to update your configuration.' in /home/vacationhomesand/public_html/google-api-php-client-master/src/Google/Http/REST.php:111 Stack trace: #0 /home/vacationhomesand/public_html/google-api-php-client-master/src/Google/Http/REST.php(63): Google_Http_REST::decodeHttpResponse(Object(Google_Http_Request), Object(Google_Client)) #1 [internal function]: Google_Http_REST::doExecute(Object(Google_Client), Object(Google_Http_Request)) #2 /home/vacationhomesand/public_html/google-api-php-client-master/src/Google/Task/Runner.php(172): call_user_func_array(Array, Array) #3 /home/vacat in /home/vacationhomesand/public_html/google-api-php-client-master/src/Google/Http/REST.php on line 111