here is the login controller for customer

class LoginController extends Controller
{

    use AuthenticatesUsers;

    public function __construct()
    {
       $this->middleware('guest:customer')->except('customerlogout');
    }

    //login the customer
    public function customerLogin(Request $request)
    {
        $email = $request->get('email');
        $password = $request->get('password');
        
        
        //Getting user inputs and authenticate the customer
        $status = Auth::guard('customer')->attempt([
            'email' => $email, 
            'password' => $password ] 
            );

        //Check login  
        if ($status) {
            //if login pass,redirect to customer account page
            return redirect()->intended('/customer_account');
            
         }else{
             //if login fail,redirect back to home page
             return redirect()->back();
         }
    }
    
    //logout the customer
    public function customerlogout(Request $request)
    {   
        Auth::guard('customer')->logout();
        $request->session()->flush();
        return redirect('/index');   
    }
}

here is the guest middleware

    public function handle($request, Closure $next, $guard = null)
    {       
        if ($guard === "customer" && Auth::guard($guard)->check()) {
            return redirect('/customer_account');
        }
        if (!Auth::guard($guard)->check()) {
            return redirect('/index');
        }
        return $next($request);
    }

Any help is appreciated, thanks!