AWS SDK javascript v3 register new quicksight user

.js

const registerUser = async (qsClient, email) => {
    console.log(`Registering user`);
    const param = {
        IdentityType: "IAM",
        Email: email,
        UserRole: "READER",
        IamArn: QUICKSIGHT_ROLE_ARN,
        SessionName: email,
        AwsAccountId: AWS_ACCOUNT_ID,
        Namespace: "default"
    };
    const command = new RegisterUserCommand(param);

    try {
        const response = await qsClient.send(command);
        console.log(JSON.stringify(response));
        return response;
    } catch (error) {
        // registerUser need to be called only once on subsequent hit it will give error httpStatusCode: 409,
        console.log(JSON.stringify(error));
        return {};
    }
}