akaunting/app/Abstracts/Http/ApiController.php

<?php

namespace App\Abstracts\Http;

use App\Traits\Jobs;
use App\Traits\Permissions;
use App\Traits\Relationships;
use Dingo\Api\Exception\ResourceException;
use Dingo\Api\Routing\Helpers;
use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Http\Request;
use Illuminate\Routing\Controller as BaseController;

abstract class ApiController extends BaseController
{
    use AuthorizesRequests, Jobs, Helpers, Permissions, Relationships, ValidatesRequests;

    /**
     * Instantiate a new controller instance.
     */
    public function __construct()
    {
        $this->assignPermissionsToController();
    }

    /**
     * Create the response for when a request fails validation.
     *
     * @param  \Illuminate\Http\Request $request
     * @param  array $errors
     * @return \Symfony\Component\HttpFoundation\Response
     */
    protected function buildFailedValidationResponse(Request $request, array $errors)
    {
        if ($request->expectsJson()) {
            throw new ResourceException('Validation Error', $errors);
        }

        return redirect()->to($this->getRedirectUrl())->withInput($request->input())->withErrors($errors, $this->errorBag());
    }
}