WASHINGTON (AP) — TikTok says it will have to “go dark” this weekend unless the outgoing Biden administration assures the company it won’t enforce a shutdown of the popular app after the Supreme Court unanimously upheld the federal law banning the app unless it’s sold by its China-based parent company. The court ruled Friday the risk to national security posed by TikTok’s ties to China overcomes concerns about limiting speech by the app or its 170 million users in the U.S. The court’s decision means new users won’t be able to download the app and updates won’t be available, but it won’t disappear from users’ phones.