Registering and logging in to Avantgarde Casino is designed to be quick and secure. To register, visit the casino's website, click on the 'Sign Up' button, and fill in your personal details such as name, email, and address. You will need to create a username and password, select your preferred currency, and accept the terms and conditions. After verifying your email, your account will be activated. Logging in requires entering your username and password on the homepage. Avantgarde Casino also offers two-factor authentication for added security.