Auto fill address when pin code entered

Hello Everyone,
I have no knowledge of coding and thatswhy I took a plan on wix. I am building a website for my business on wix editor. I have made a form and i want that when a user enters pin code, fields like area, city and district should auto fill. I have the api for India but i dont know how to do it. I mean how should I put it? Please help me. My website is www.bankshub.in. It is not published yet. Please understand that i have absolutely no knowledge of coding. Thanks and Regards.

What API are you using? Perhaps a link to the API documentation would help.

I have created a test site that shows it working. Check it out: https://preztech.wixstudio.io/test/pincode

Here’s the code:

import { getJSON } from 'wix-fetch';

const url = "https://api.postalpincode.in/pincode/";

$w.onReady(function () {

});

export function button1_click(event) {

    if ($w('#pincode')) {

        let pin = $w("#pincode").value;
        let fullUrl = `${url}${pin}`;
        $w('#link').text = fullUrl;

        $w('#status').text = "FETCHING...";

        getJSON(fullUrl)
            .then(json => {
                if (json[0].Status == "Success") {
                    $w('#status').text = json[0].Status;
                    $w("#area").value = json[0].PostOffice[0].Name;
                    $w("#city").value = json[0].PostOffice[0].Region;
                    $w("#district").value = json[0].PostOffice[0].District;
                } else {
                    $w('#status').text = "ERROR";
                    $w("#area").value = "";
                    $w("#city").value = "";
                    $w("#district").value = "";
                }
            })

    }

}

I have dropped you a message, check it out: