You want users logging into their Fivetran account to provide a second authentication factor, such as SMS verification.
Fivetran does not support two-factor authentication (TFA) when logging in with a native Fivetran account.
However, many identity providers (such as Okta and Azure Active Directory) provide two-factor authentication as a standard capability. Use SAML to configure Fivetran to authenticate your users using the external identity providers.
Read our SAML Config instructions to configure authentication with SAML.
SAML authentication provides the added benefit of controlling access to Fivetran from within your identity management system.