10. User Account<p> 10.1. The Customer shall be fully responsible for the activity that occurs under his User Account, including all data processing and other acts performed through or by means thereof, and must notify the Supplier promptly upon learning of any security breach relating to or unauthorised use of his User Account.</p> <p> 10.2. It shall be the User's own responsibility to maintain the confidentiality of his usernames, passwords, access tokens and similar credentials.</p> <p> 10.3.