Symfony\Component\Security\Core\Authentication\Token\AbstractToken::__toString PHP Method

    public function __toString()
    {
        $class = get_class($this);
        $class = substr($class, strrpos($class, '\\') + 1);

        $roles = array();
        foreach ($this->roles as $role) {
            $roles[] = $role->getRole();
        }

        return sprintf('%s(user="%s", authenticated=%s, roles="%s")', $class, $this->getUsername(), json_encode($this->authenticated), implode(', ', $roles));
    }