datatable.directory/app/Exceptions/Handler.php

<?php

namespace App\Exceptions;

use Exception;
use Illuminate\Auth\AuthenticationException;
use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use Illuminate\Validation\ValidationException;

class Handler extends ExceptionHandler
{
    /**
     * A list of the exception types that are not reported.
     *
     * @var array
     */
    protected $dontReport = [
        //
    ];

    /**
     * A list of the inputs that are never flashed for validation exceptions.
     *
     * @var array
     */
    protected $dontFlash = [
        'password',
        'password_confirmation',
    ];

    /**
     * Report or log an exception.
     *
     * @param  \Exception  $exception
     * @return void
     */
    public function report(Exception $exception)
    {
        parent::report($exception);
    }

    /**
     * Render an exception into an HTTP response.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Exception  $exception
     * @return \Illuminate\Http\Response
     */
    public function render($request, Exception $exception)
    {
        return parent::render($request, $exception);
    }

	/**
	 * Redirect to the login field on failed auth
	 *
	 * @param \Illuminate\Http\Request $request
	 * @param AuthenticationException  $exception
	 * @return \Illuminate\Http\Response
	 */
	protected function unauthenticated($request, AuthenticationException $exception)
	{
		return $request->expectsJson()
			? response()->json(['message' => $exception->getMessage()], 401)
			: redirect()->guest(route('login'));
	}

    /**
     * Convert a validation exception into a response.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Illuminate\Validation\ValidationException  $exception
     * @return \Illuminate\Http\Response
     */
    protected function invalid($request, ValidationException $exception)
    {
        flash()->error("Some form fields were not filled correctly.");

        return redirect($exception->redirectTo ?? url()->previous())
            ->withInput($request->except($this->dontFlash))
            ->withErrors($exception->errors(), $exception->errorBag);
    }
}