Logout Mthod of Larave API with Passport

UserController.php

    public function logout(Request $res)
    {
      if (Auth::user()) {
        $user = Auth::user()->token();
        $user->revoke();

        return response()->json([
          'success' => true,
          'message' => 'Logout successfully'
      ]);
      }else {
        return response()->json([
          'success' => false,
          'message' => 'Unable to Logout'
        ]);
      }
     }