Authy is not an SSO provider, it is a second factor authentication. To use mfa as an authentication mechanism you need to use an actual IdP and configure that IDP to support Authy as your 2FA source when requesting a login which requires a second factor for authentication.
There’s no such thing as a “random Authy code.” Authy codes are tied to user identification, which is why you would need an IdP from cscharff’s link that uses Authy for 2FA. Then that Authentication Method can specify MFA use.
Cloudflare Access works with Authy just fine. I described how.
You can’t. The 2 in 2FA means ‘second’. To have a second requires a first. To have more than one factor in authentication requires an additional factor for authentication beyond Authy. The supported additional factors for use with Authy are described in the link I provided in my previous reply.
Maybe i didnt put the question correctly. So lets say im going to a tunnel link of my docker container, i login with 2fa by getting an email validation code, which works. but can this email be replaced with authy, aka 2 2fa app?
To use Authy, one must first enter a username, then a password. Once that’s accepted, you’re prompted for a 2FA code. Those need to happen in relatively short succession. That’s what SSO checks for before you’re allowed through Access, if that’s the configured method.