How does it work?
1. Create an account
Click the sign up button to create a disposable demo account - don't worry you don't need to provide an email address or anything.
2. Download your image
When your account is created, you'll be shown an image. Right click (or hold if you're using a touch screen) to download it.
3. Login with your image
Click sign out. Then to login again, just upload your image.