php - Issue: Argument #1 ($user) must be of type IlluminateContractsAuthAuthenticatable, null given, called in

I'm beginner in Laravel. I'm using jetstream for auth. When I trying register to database, it saves to database but gives this error. So how can I fix this problem

My HomeController is:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Auth;

class HomeController extends Controller
{
    protected $user;


    public function __construct(){
        $this->middleware(function ($request, $next) {
            $this->user= Auth::user();

            return $next($request);
        });
    }

    public function main(){
        return view('welcome');
    }

    public function home(){
        return view('design2.index');
    }

    public function logout(Request $request) {
        Auth::logout();
        return redirect('/');
      }

    public function register(){
        return view('design2.registerpage');
    }

    public function login_page(){
        return view('design2.loginpage');
    }

    public function profile(){
        return view('profile');
    }

}

My user model is:

<?php

namespace App\Models;

use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
use Laravel\Fortify\TwoFactorAuthenticatable;
use Laravel\Jetstream\HasProfilePhoto;
use Laravel\Sanctum\HasApiTokens;

class User extends Authenticatable
{
    use HasApiTokens;
    use HasFactory;
    use HasProfilePhoto;
    use Notifiable;
    use TwoFactorAuthenticatable;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name',
        'email',
        'password',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password',
        'remember_token',
        'two_factor_recovery_codes',
        'two_factor_secret',
    ];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [
        'email_verified_at' => 'datetime',
    ];

    /**
     * The accessors to append to the model's array form.
     *
     * @var array
     */
    protected $appends = [
        'profile_photo_url',
    ];
}

My CreateNewUser is:

<?php

namespace App\Actions\Fortify;

use App\Models\User;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\Validator;
use Laravel\Fortify\Contracts\CreatesNewUsers;
use Laravel\Jetstream\Jetstream;

class CreateNewUser implements CreatesNewUsers
{
    use PasswordValidationRules;

    /**
     * Validate and create a newly registered user.
     *
     * @param  array  $input
     * @return \App\Models\User
     */
    public function create(array $input)
    {
        Validator::make($input, [
            'name' => ['required', 'string', 'max:255'],
            'email' => ['required', 'string', 'email', 'max:255', 'unique:users'],
            'password' => $this->passwordRules(),
            
            
        ])->validate();

        $save = User::create([
            'name' => $input['name'],
            'email' => $input['email'],
            'password' => Hash::make($input['password']),
        ]);
 

    }
}

Error is:

Illuminate\Auth\SessionGuard::login(): Argument #1 ($user) must be of type Illuminate\Contracts\Auth\Authenticatable, null given, called in /Applications/XAMPP/xamppfiles/htdocs/muzik/vendor/laravel/fortify/src/Http/Controllers/RegisteredUserController.php on line 56

Solution:

Try to return created user instead of just save it in variable $save.

    public function create(array $input)
    {
        Validator::make($input, [
            'name' => ['required', 'string', 'max:255'],
            'email' => ['required', 'string', 'email', 'max:255', 'unique:users'],
            'password' => $this->passwordRules(),                     
        ])->validate();

        return User::create([
            'name' => $input['name'],
            'email' => $input['email'],
            'password' => Hash::make($input['password']),
        ]);
    }