Issue with logout a user form custom middleware.

I have created a custom Middleware for my Offerwall users.

Offerwall Middleware.

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;

class Offerwall
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure(\Illuminate\Http\Request): (\Illuminate\Http\Response|\Illuminate\Http\RedirectResponse)  $next
     * @return \Illuminate\Http\Response|\Illuminate\Http\RedirectResponse
     */
    public function handle(Request $request, Closure $next)
    {
        if (Auth::guard('offerwall')->check()) {
            return $next($request);
        }
        return response()->json(['error' => 'Unauthenticated'], 401);
    }
}

in Kernel.php

 'offerwall' => [
            \Illuminate\Routing\Middleware\SubstituteBindings::class,
        ],

protected $routeMiddleware = [
       //other middleware
        'offerwall' => \App\Http\Middleware\OfferwallMiddleware::class,
    ];

In config/auth

 'guards' => [
        'web' => [
            'driver' => 'session',
            'provider' => 'users',
        ],

        'offerwall' => [
            'driver' => 'session',
            'provider' => 'offerwalls',
        ],

        'api' => [
            'driver' => 'token',
            'provider' => 'users',
            'hash' => false,
        ],
    ],

'providers' => [
        'users' => [
            'driver' => 'eloquent',
            'model' => App\Models\User::class,
        ],

        'offerwalls' => [
            'driver' => 'eloquent',
            'model' => App\Models\OfferwallUsers::class,
        ],
        // 'users' => [
        //     'driver' => 'database',
        //     'table' => 'users',
        // ],
    ],

In api.php i have

Route::middleware('offerwall')->group(function () {

  Route::get('/redirect/offer/{api}/{user}/{oid}', [OfferwallController::class, 'redirect']);
  //Route::post('/wallstatus', [OfferwallController::class, 'wallstatus']);
  Route::get('/offers', [OfferwallController::class, 'offers']);
  Route::post('/wall_logout', [OfferwallController::class, 'logout']);

});

And in Offerwall Controller

public function logout(Request $request){
    $this->guard()->logout();
    $request->session()->flush();
    $request->session()->regenerate();
    return response()->json(['success' => 'Offerwall User logget Out.']);
   }

protected function guard()
    {
        return Auth::guard('offerwall');
    }

Also this is my Offerwalll User Model

<?php

namespace App\Models;

use Illuminate\Contracts\Auth\Authenticatable;
//use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
//use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
//use Laravel\Sanctum\HasApiTokens;

//class OfferwallUsers extends Model
class OfferwallUsers extends Model implements Authenticatable
//class OfferwallUsers extends Authenticatable

{
    use Notifiable;
    protected $guard = 'offerwall';

    protected $fillable = [
        'name',
        'email',
        'password',
        'points',
        'p_points',
    ];

    protected $hidden = [
        'password',
    ];

    protected $casts = [
        'email_verified_at' => 'datetime',
    ];

    public function getAuthIdentifierName()
    {
        return 'id';
    }

    public function getAuthIdentifier()
    {
        return $this->getKey();
    }

    public function getAuthPassword()
    {
        return $this->password;
    }

    public function getRememberToken()
    {
        return $this->getRememberToken();
    }

    public function setRememberToken($value)
    {
        $this->remember_token = $value;
    }

    public function getRememberTokenName()
    {
        return 'remember_token';
    }

}

My issue is that i cant logout the offerwall user , when i try to logout i get app.js:20900

   POST http://127.0.0.1:8000/api/wall_logout 500 (Internal Server Error) and blank white page in Console->preview.  Please help me. Thank you.