make code wait for async 8.2

The async function to wait

function getSetting (settingName)
{
var req = new XMLHttpRequest();

return new Promise(function (resolve, reject) {

    // Setup our listener to process compeleted requests
    req.onreadystatechange = function () {

        // Only run if the request is complete
        if (req.readyState !== 4) return;

        // Process the response
        if (req.status >= 200 && req.status < 300) {
            // If successful
            resolve
            ( req      );
        } else {
            // If failed
            reject(
                alert ("multiple setting with the name :" + settingName)
            );
        }

    };

req.open("GET", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/query, false);
req.setRequestHeader("OData-MaxVersion", "4.0");
req.setRequestHeader("OData-Version", "4.0");
req.setRequestHeader("Accept", "application/json");
req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
req.setRequestHeader("Prefer", "odata.include-annotations=\"*\"");
    req.send();

}
);
}



the function that call


async function setDefaultFrom(executionContext)
{
debugger;
var results = await getSetting (param);
var defaultFrom = JSON.parse(results.response);



}