Finding telegram message_id while using google app script - google-apps-script

Question

I am trying to obtain the message ID of the latest message I have using the bot coded on google app script, but I seem to have trouble getting it.
Here is my sendMessage function:
function sendMessage(chat_id, message) {
const data = {
method:"post",
payload:{
method:"sendMessage",
chat_id: String(chat_id),
text: message,
parse_mode: "HTML"
}
};
UrlFetchApp.fetch(teleUrl + "/", data);
}
If my understanding of asynchronous functions is right, have tried using an asynchronous function to wait for a reply, but when I try running the function on google app script, I get returned an empty object. However, based on Telegram's API documentation, I am supposed to get back a "message" object.
async function test() {
const message = await sendMessage(chat_id, "HI");
return message;
}
function greeting() {
const message = test();
Logger.log(message);
//result is {}, an empty object
}

Answer 1

The endpoint is synchronous. Also, sendMessage is not returning any value.
function sendMessage(chat_id, message) {
const data = {
method:"post",
payload:{
method:"sendMessage",
chat_id: String(chat_id),
text: message,
parse_mode: "HTML"
}
};
const response = UrlFetchApp.fetch(teleUrl + "/", data);
const content = response.getContentText();
const message = JSON.parse(content);
return message;
}
function greeting() {
const message = sendMessage();
Logger.log(message);
const {message_id} = message;
Logger.log(message_id);
}