Fatal error: Uncaught Error: Class 'Rebing\GraphQL\Support\Mutation' not found in /home/devypfrfhn/brifault/vendor/rebing/graphql-laravel/src/example/Mutation/LoginMutation.php:8 Stack trace: #0 {main} thrown in /home/devypfrfhn/brifault/vendor/rebing/graphql-laravel/src/example/Mutation/LoginMutation.php on line 8