New Sendgrid node module, send email to more than one address with variable template[SOLVED]

Hi I was hoping someone might be able to help me with my code, i'm trying to get some variable templates through sendgrid to deliver with an onClick through a repeater. The template works as I have tested through onAfterUpdate. I'm just trying to get this to happen with a button click.

Backend

import {fetch} from 'wix-fetch';
import sgMail  from '@sendgrid/mail';
import wixData from 'wix-data';


export function sendOutstandinglnvoiceEmail(){
    sgMail.setApiKey('API KEY here');
    wixData.query("CourseAvailability")
    .find()
    .then((results) => {
 let item = results.items[0];
 let fullname = item.fullName;
 let courseTitle = item.title;
 let totalPrice = item.totalPrice;
 let outstandingBalance = item.outstandingBalance;
 const msg = {
            to: item.customerEmail,
 from: "info@scottishrockandwater.com",
            templateId: 'd-c68106a391a24fe0b08c22285fc2427e', //Outstanding Invoice
            dynamic_template_data: {
                name: fullname,
                courseTitle: courseTitle,
                totalPrice: totalPrice,
                outstandingBalance: outstandingBalance,
            },
        };
        sgMail.send(msg);
        console.log(fullname)
        console.log(courseTitle)
        console.log(totalPrice)
        console.log(outstandingBalance)
    })
}

Frontend

import {sendOutstandinglnvoiceEmail} from 'backend/email';

//various repeater data above this hence the itemData
$w("#sendReminderButton").onClick((event) => {
                        sendOutstandinglnvoiceEmail(
                                itemData.customerEmail,
                                itemData.fullname,
                                itemData.title,
                                itemData.oustandingBalance,
                                itemData.totalPrice)
                            .then(function () {
                                console.log("email was sent");
                            })
                            .catch((err) => {
                                console.log("Error!");
                            });
                    })

Errors

I'm sure a few links will be sent over but I've been trying to achieve this for the 36 hours and I'm pretty confident I have read them I just can't figure this out.

I feel close with this one just need to get the data transferred to send the email I think...

Thank you in advance and I hope this is clear enough to be able to help.