If you have a ticket for Web Summit Rio, you can login to your ticket dashboard at: rio.websummit.com/my/wsr23/login using the email address you 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 rio.websummit.com/my/wsr23/login and view your ticket.