Unable to create Request object in laravel 5.6 controller

Controller name MyController

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class MyController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index(){
        //
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create(){
        //
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request){
        //
        $request->session()->put('key', '123');
        $data = $request->session()->get('key');
        print_r($data);
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id){
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id){
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id){
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy($id){
        //
    }
    public function contact(){
        return view('contact');
    }

    public function createSession(Request $request){
        //
        $request->session()->put('key', '123');
        $data = $request->session()->get('key');
        print_r($data);
    }
    public function viewSession_v1(Request $request){
        $data = $request->session()->get('key');
        print_r($data);
    }
    public function viewSession_v2(Request $request){
        $data = $request->session()->get('key');
        print_r($data);
    }
}

Route:

Route::get('createSession', 'MyController@createSession');
Route::get('viewSession-1', 'MyController@viewSession_v1');
Route::get('viewSession-2', 'MyController@viewSession_v2');

Now when I call "createSession" it will create new session and when i call either "viewSession-1" or "viewSession-2" it will display session value but I want to remove Request $request from viewSession_v2() so I did following code:

public function viewSession_v2(){
        $request = new \Illuminate\Http\Request();
        $data = $request->session()->get('key');
        print_r($data);
    }

Now when I call "viewSession-2" it will give me following error

Please anyone can tell me how can I create request object in method/function? and why it gives me an error here?