Fatal error: Uncaught Error: Interface "Kreait\Firebase\Exception\AuthException" not found in /var/www/html/firePhpSdk/vendor/kreait/firebase-php/src/Firebase/Exception/Auth/InvalidCustomToken.php:10 Stack trace: #0 {main} thrown in /var/www/html/firePhpSdk/vendor/kreait/firebase-php/src/Firebase/Exception/Auth/InvalidCustomToken.php on line 10