How to get OTP when resetting password cognito user pool ?

Hi, I have implemented logic for adding user and generating temporary password, when user login using temporary password they get session token and. by the session token i am setting password for the user.

Now the issue is user forgot there password and i need to send otp to users email adderess to reset password but otp is not received on email. I have tried with multiple email but not receving the otp.

Blow is the implementation code.

import { CognitoIdentityProviderClient, ForgotPasswordCommand } from '@aws-sdk/client-cognito-identity-provider';

const config = {
	region: 'ap-southeast-2', // Replace with your desired region
	credentials: {
		accessKeyId: 'AKIA3UWX65VUBRKJ', // Replace with your AWS Access Key ID
		secretAccessKey: '8SD+2uTrYlt4XKt3EV9mvZg/tIgw3h', // Replace with your AWS Secret Access Key
	},
};

const client = new CognitoIdentityProviderClient(config);

export const requestOtp = async (request) => {
	if (request.method === 'POST') {
		const requestBody = await request.text();
		const body = JSON.parse(requestBody);

		const { email, clientId } = body;

		const forgotPasswordParams = {
			ClientId: clientId,
			Username: email,
		};

		try {
			const forgotPasswordCommand = new ForgotPasswordCommand(forgotPasswordParams);
			const result = await client.send(forgotPasswordCommand);

			return new Response(JSON.stringify({ message: 'otp sent successful', result }), {
				status: 200,
				headers: { 'Content-Type': 'application/json' },
			});
		} catch (error) {
			return new Response(JSON.stringify({ error: 'otp sent failed', object: error }), {
				status: 401,
				headers: { 'Content-Type': 'application/json' },
			});
		}
	} else {
		return new Response('Invalid request method', { status: 405 });
	}
};

Response I am getting from the api endpoint.

{
    "message": "otp sent successful",
    "result": {
        "$metadata": {
            "httpStatusCode": 200,
            "requestId": "fdedd24f-dd1e-4b3b-a706-c5c9f7464eb5",
            "attempts": 1,
            "totalRetryDelay": 0
        },
        "CodeDeliveryDetails": {
            "AttributeName": "email",
            "DeliveryMedium": "EMAIL",
            "Destination": "a***@b***"
        }
    }
}

But the issue is i am not getting otp.