Newscoop\Services\Auth\DoctrineAuthService::authenticate PHP Method

    public function authenticate()
    {
        if ($this->is_admin || !empty($this->username)) {
            $params = array('username' => $this->username);
        } elseif (!empty($this->email)) {
            $params = array('email' => $this->email);
        }
        $user = isset($params) ? $this->em->getRepository('Newscoop\\Entity\\User')->findOneBy($params) : null;
        if (empty($user)) {
            return new \Zend_Auth_Result(\Zend_Auth_Result::FAILURE_IDENTITY_NOT_FOUND, NULL);
        }
        if (!$user->isActive()) {
            return new \Zend_Auth_Result(\Zend_Auth_Result::FAILURE_UNCATEGORIZED, NULL);
        }
        if ($this->is_admin && !$user->isAdmin()) {
            return new \Zend_Auth_Result(\Zend_Auth_Result::FAILURE_UNCATEGORIZED, NULL);
        }
        if (!$this->is_external && !$user->checkPassword($this->password)) {
            return new \Zend_Auth_Result(\Zend_Auth_Result::FAILURE_CREDENTIAL_INVALID, NULL);
        }
        $user->setLastLogin(new \DateTime());
        $this->em->flush();
        // store updated password
        return new \Zend_Auth_Result(\Zend_Auth_Result::SUCCESS, $user->getId());
    }