Fatal error: Uncaught Error: Class "Google\AuthHandler\Guzzle6AuthHandler" not found in C:\xampp8\htdocs\Gsheet\vendor\google\apiclient\src\AuthHandler\Guzzle7AuthHandler.php:23 Stack trace: #0 {main} thrown in C:\xampp8\htdocs\Gsheet\vendor\google\apiclient\src\AuthHandler\Guzzle7AuthHandler.php on line 23