public static string ApiKey(string siteUrl, string username, string password)
{
NameValueCollection queryArguments = new NameValueCollection();
queryArguments.Add("SiteUrl", siteUrl);
HttpHelper.OverrideAuthenticationCredentials(username, password);
string json = HttpHelper.Get("/apikey.json", queryArguments);
//reset to default authentication
HttpHelper.OverrideAuthenticationCredentials(CreateSendOptions.ApiKey, "x");
return(JavaScriptConvert.DeserializeObject <ApiKeyResult>(json).ApiKey);
}