eZ\Publish\Core\Repository\UserService::loadUsersByEmail PHP Method

    public function loadUsersByEmail($email)
    {
        if (!is_string($email) || empty($email)) {
            throw new InvalidArgumentValue('email', $email);
        }
        $users = array();
        foreach ($this->userHandler->loadByEmail($email) as $spiUser) {
            $users[] = $this->buildDomainUserObject($spiUser);
        }
        return $users;
    }