public function updateUser($id, $username, $email, $role)
{
$object = array();
$object["username"] = $username;
$object["email"] = $email;
$object["role"] = $role;
$wkey["id"] = $id;
if ($ret = $this->update($object, $wkey)) {
$user = $this->getById($id);
return $user;
} else {
return false;
}
}