public function getAllUsers()
{
$sql = "\n\t\t\t\tSELECT id, username, first_name, last_name, email\n\t\t\t\tFROM users\n\t\t\t\tORDER BY last_name ASC\n\t\t\t";
$col = new Collection($sql, array("User" => "id"));
return $col->getMap();
}
