try {
            $email = $post['email'];
            $password = sha1( md5( pg_escape_string( $post['password'] ) ) );
            $this->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
            $this->beginTransaction();
            $prepared = $this->prepare( "INSERT INTO ".TP."_users (email, password) VALUES ( '$email', '$password' )" );
            $prepared->execute;
        } catch ( PDOException $e ) {
            $db_err = $e->getMessage();
            $this->rollBack();
            $response = array(
                'ok'    =>  false,
                'msg'   =>  $db_err );
            return $response;
        }
        $this->commit();
        $uid = $this->lastInsertId('users_id_seq');