animethemes-server/app/Http/Middleware/Auth/Authenticate.php

<?php

declare(strict_types=1);

namespace App\Http\Middleware\Auth;

use Illuminate\Auth\Middleware\Authenticate as Middleware;
use Illuminate\Http\Request;

/**
 * Class Authenticate.
 */
class Authenticate extends Middleware
{
    /**
     * Get the path the user should be redirected to when they are not authenticated.
     *
     * @param  Request  $request
     * @return string|null
     *
     * @noinspection PhpMissingParentCallCommonInspection
     */
    protected function redirectTo($request): ?string
    {
        if (! $request->expectsJson()) {
            return route('login');
        }

        return null;
    }
}