If you have a ticket for Web Summit Rio, you can login to your ticket dashboard at: websummit.com/my/wsr23/login using the email address your made your order with. A login link will be sent to this email. 

If you weren't the person who made the order but know you have a ticket assigned to you, you can also login at 
websummit.com/my/wsr23/login and view your ticket.