To enable 2FA, log in to the Sinch Customer Dashboard and select the Security option from the Settings menu on the left panel. The Security page is displayed:
Select the Enable for this account option to enable 2FA for the current account. This feature requires that at least one admin has a valid phone number that can receive the verification code. Once enabled all users in that account are required to verify their logins either by phone (if added to their user profile) or by e-mail.