public static Response FromXml(XmlDocument xmlDoc)
{
var obj = new Response();
obj.customerId = xmlDoc.SelectSingleNode("MasMessage/GetDynNumContent/customerId").InnerText;
obj.token = xmlDoc.SelectSingleNode("MasMessage/GetDynNumContent/token").InnerText;
obj.responseCode = xmlDoc.SelectSingleNode("MasMessage/GetDynNumContent/responseCode").InnerText;
return obj;
}