HTTP API Lambda authorizer

Hey there i am using custom lambda authorizer to authorize my api routes in API Gateway . Iam using HTTP API. following is my code Note: Iam using HTTP API in api gateway

/* ** custom authorizer for admin */ export const customAuthMiddlewareForAdmin = async (event: APIGatewayEvent) => { console.log('customAuthMiddlewareForAdmin payload event', event);

const authorizationHeader = event?.headers?.Authorization || event?.headers?.authorization || null; console.log('authorizationHeader', authorizationHeader); if (authorizationHeader) { console.log('allowed'); try { // verifyning token const userData = await apiUtils.verifyCognitoToken(authorizationHeader);

  console.log('userData: in authorizer', userData);

  if (userData) {
    // checking the token user
    const isUser = await userService.getUser(`USER-${userData?.sub}`);
    console.log('isUser', isUser);
    if (!isUser) {
      throw new Error('Token user not found');
    }
    if (!isUser?.isAdmin) {
      throw new Error('Only admin allowed to access this resource');
    }
  }
  // return next();
  return {
    isAuthorized: true,
    context: {
      stringKey: 'exampleValue',
    },
  };
} catch (error) {
  console.log('ERROR AUTHORIZATION admin', error);
  return {
    isAuthorized: false,
    context: {
      stringKey: 'exampleValue',
    },
  };
}

} else { console.log('denied'); throw Error('Token required'); } };

But every time its showing status 403 with a message of "forbidden" when ever i pass isAuthorized = false. The problem is i want to customize the error message i search alot for days but don't find any solution up till now. How do i am gonna change error message for lamdba authorizer. all solution available is for REST API not the HTTP API.