private function getStoredPassword($username)
    {
        // Get table object
        $db = $this->app->db->reset()->table($this->table);

        // Find user by username column
        $user = $db->select($this->passwordColumn)->limit(1)->where($this->usernameColumn, $username)->getOne();

        // Abort if the user or the password column do not exist
        if (!is_array($user) || !isset($user[$this->passwordColumn])) {
            return false;
        }

        // Return password column
        return $user[$this->passwordColumn];
    }