nextcloud / server

		$userManager = \OC::$server->getUserManager();

		$userObject = $userManager->get($user);

		if (is_null($userObject)) {

			\OCP\Util::writeLog('files', ' Backends provided no user object for ' . $user, \OCP\Util::ERROR);

			// reset flag, this will make it possible to rethrow the exception if called again

			unset(self::$usersSetup[$user]);

			throw new \OC\User\NoUserException('Backends provided no user object for ' . $user);

		}

		$realUid = $userObject->getUID();

		// workaround in case of different casings

		if ($expiration->isEnabled()) {

			// get available disk space for user

			$user = \OC::$server->getUserManager()->get($uid);

			if (is_null($user)) {

				\OCP\Util::writeLog('files_versions', 'Backends provided no user object for ' . $uid, \OCP\Util::ERROR);

				throw new \OC\User\NoUserException('Backends provided no user object for ' . $uid);

			}

			\OC_Util::setupFS($uid);