(Reuters) – TikTok CEO Shou Zi Chew said on Friday he wanted to thank U.S. President-elect Donald Trump for his commitment to work with the company and find a solution that would keep the app available in United States.

The company has until Sunday, January 19, to cut ties with its China-based parent ByteDance or close its US operations to address concerns that it poses a threat to national security.

Supreme Court justices upheld the ban on Friday in a unanimous decision and a White House statement suggested Biden would not act to save TikTok before the deadline.

Trump said on Friday that the decision on the future of the TikTok app is up to him, but did not provide any details on what steps he would take. Media reports say he is considering an executive order that would suspend enforcement of the TikTok sell-or-ban law for 60 to 90 days.

Trump also said he and Chinese President Xi Jinping discussed issues including TikTok in a phone call on Friday.

Chew plans to attend the US presidential inauguration on January 20 and sit among the high-profile guests invited by Trump, a source told Reuters.