/// <summary>
/// Get users list
/// </summary>
/// <returns></returns>
async internal Task <TransactionResult <Users> > GetUsers()
{
DataRequest parameters = new DataRequest();
parameters.Add("_format", "json");
parameters.Add("access-token", Parameters.Access_Token);
String url = DataUtil.buildUrl(USER_LIST, parameters);
TransactionResult <Users> result = await DependencyService.Get <ApiService>().get <Users>(url);
return(result);
}