When you sign up you have to enter your username and your password or you link a Google account. If you connect a Google account, we save your account identifier and the email address of that account. You can also optionally add an email address while signing up or in your account settings. <br> <br> Usually, your <strong>username</strong> cannot be traced back to you except if it contains your name or if you also use it on other platforms. Because of that, we protect your username the same way we protect personal data.