customize error for graphql

ErrorCatch.php

<?php namespace Name\Graphql\Classes;

use GraphQL\Error\Error;
use Rebing\GraphQL\Error\ValidationError;
use Rebing\GraphQL\GraphQL;

class ErrorCatch extends GraphQL
{
    public static function formatError(Error $e)
    {
        $error = ['message' => $e->getMessage()];

        $previous = $e->getPrevious();
        if ($previous && $previous instanceof ValidationError) {
            $error['validation'] = $previous->getValidatorMessages();
        }

        return $error;
    }
}