TikTok's chief executive will tell US politicians today that the Chinese-owned video sharing app has never, and would never, share American user data with the Chinese government. Shou Zi Chew is due to testify before the US Congress as TikTok comes under increasing scrutiny over how much access China has to user data. The US and UK governments, as well as EU institutions, have moved to ban the app on official devices over cybersecurity fears. On Monday, the Minister for Justice Simon Harris said that he has not received any security advice to change the usage policy in relation to…