Trying to send automatic email to new website registration

I am trying to use azure to send automatic email, I am using a combination of Azure Communication Services and Azure Function App. I am trying to get users of my website receive an automatic email when they sign up. I am using a HTTP trigger in Azure function to automate the process. When I copy the JS code from ACS to the function app I get a server error and haven’t been able to troubleshoot it yet. This is the code

const { EmailClient } = require("@azure/communication-email");

const connectionString = "endpoint=https://test-email-ktv.uk.communication.azure.com/;accesskey=DZx53W8VWIWSD312Ujt3aUeD63AdwCrJ7ZnYRNxodcUFgISfqIjOJQQJ99AKACULyCpygbUvAAAAAZCSSiCT";
const client = new EmailClient(connectionString);

async function sendEmail(name, email) {
    const emailMessage = {
        senderAddress: "f6772394-f09c-4dc0-94db-c424bc104f40.azurecomm.net", // Replace <from_domain> with your verified domain
        content: {
            subject: "Membership Confirmation",
            plainText: `Hello ${name},nnThank you for signing up!`,
            html: `
                <html>
                    <body>
                        <h1>Hello ${name},</h1>
                        <p>Thank you for signing up! We have received your details.</p>
                    </body>
                </html>`,
        },
        recipients: {
            to: [{ address: email }],
        },
    };

    try {
        const poller = await client.beginSend(emailMessage);
        const result = await poller.pollUntilDone();
        console.log("Email sent successfully:", result);
        return { success: true, message: "Email sent successfully" };
    } catch (error) {
        console.error("Error sending email:", error);
        return { success: false, message: "Failed to send email" };
    }
}

module.exports = async function (context, req) {
    const { name, email } = req.body; 

    if (!name || !email) {
        context.res = {
            status: 400,
            body: { message: "Name and Email are required." },
        };
        return;
    }

    const response = await sendEmail(name, email);

    context.res = {
        status: response.success ? 200 : 500,
        body: { message: response.message },
    };
};

This is the code on my website javascript thats intended to send the user details over to the azure function:

document.addEventListener("DOMContentLoaded", () => {
    const form = document.getElementById("membershipForm");
    if (form) {
        form.addEventListener("submit", async (event) => {
            event.preventDefault();

            const name = document.getElementById("Full Name").value;
            const gender = document.getElementById("Gender").value;
            const email = document.getElementById("Email").value;
            const phone = document.getElementById("Phone Number").value;

            try {
                const response = await fetch("https://membership-form-function.azurewebsites.net/api/signup?", {
                    method: "POST",
                    headers: {
                        "Content-Type": "application/json"
                    },
                    body: JSON.stringify({ name, gender, email, phone })
                });

                if (response.ok) {
                    document.getElementById("responseMessage").innerText = "Email sent successfully!";
                } else {
                    document.getElementById("responseMessage").innerText = "An error occurred. Please try again.";
                }
            } catch (error) {
                document.getElementById("responseMessage").innerText = "An error occurred. Please try again.";
                console.error("Error:", error);
            }
        });
    } else {
        console.error("Form element with id 'membershipForm' not found.");
    }
});