gistfile1.php

    public function generatePasswordAction($identifier, $sendByEmail = false) {
        $this->user = \User\User::instanceWithId($identifier);
        if (!$this->user) {
            return self::NotFoundStatus;
        }

        if ($this->request->isConfirmed()) {
            $this->user->password = $this->password = \User\User::generateRandomPassword();
            $this->user->save();

            $this->response->layoutVariant = 'Successful';
            return self::AcceptedStatus;
        }
        return self::SuccessStatus;
    }