How to solve Class 'App\Http\Requests\Web\WebRequest' not found

I create a request in App\Http\Requests\Web in which it shows me the error.

Class 'App\Http\Requests\Web\WebRequest' not found

Here is the code of my Request CreateBucket.php:

namespace App\Http\Requests\Web;

class CreateBucket extends WebRequest
{
/**
 * Get the validation rules that apply to the request.
 *
 * @return array
 */
public function rules()
{
    return [
        'bucket_name' => 'required|string|string|max:30',
        'bucket_type' => 'required|string|string|max:30',
        'bucket_image' => 'nullable|image|mimes:jpeg,png,jpg,gif,svg',
    ];
}

}

And Here is my code of Bucket Controller:

<?php

namespace App\Http\Controllers\Web;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\Http\Requests\Web\CreateBucket;
use App\Bucket;

class BucketController extends Controller
{
public function index(Request $request)
{
    $buckets = Bucket::orderBy('id','ASC')->paginate(10);
    return view('buckets.index',compact('buckets',$buckets))
    ->with('i',($request->input('page',1) - 1) * 10); 
}

public function create()
{
    return view('buckets.create');
}

public function store(CreateBucket $request)
{
    if($request->hasFile('bucket_image')) {
        $bucket_image = $request->file('bucket_image');
        $bucket_image_name = time().'.'.$bucket_image->getClientOriginalExtension();
        $path = public_path('Storage/BucketImages');
        $bucket_image->move($path, $bucket_image_name);
        $bucket_image = 'Storage/BucketImages/'.$bucket_image_name;
    } else {
        $bucket_image = NULL;
    }

    $category = Category::create([
        'bucket_name' => $request->input('bucket_name'),
        'bucket_image'=> $bucket_image,
        'bucket_type' => $request->input('bucket_type'),
    ]);

    return redirect()->route('buckets.index')
                    ->with('success','Bucket created successfully');
}

Please Help me to resolve this error. Thanks.

via Chebli Mohamed