JSOM: Get Users based on SharePoint Group

function getGroupUsers(grpName) {
    var clientContext = SP.ClientContext.get_current();
    oGroups = clientContext.get_web().get_siteGroups();
    oGroup = oGroups.getByName(grpName);
    oUsers = oGroup.get_users();
    clientContext.load(oGroup);
    clientContext.load(oUsers);
    clientContext.executeQueryAsync(
        Function.createDelegate(this, function() {
            var usersInfo = '';
            var usersEnumerator = oUsers.getEnumerator();

            while (usersEnumerator.moveNext()) {
                var oUser = usersEnumerator.get_current();
                usersInfo += '\n' + 'User ID: ' + oUser.get_id() + ', ' + 'Display Name : ' + oUser.get_title()+', '+'Login Name: '+ oUser.get_loginName();
            }
            console.log(usersInfo.toString());
        }),
        Function.createDelegate(this, function() {
            console.log('failed');
        }));
}

function injectMethod() {
    getGroupUsers("Team Site Members");
}
ExecuteOrDelayUntilScriptLoaded(injectMethod, "sp.js");