Testing "two-factor auth" types of scenarios

For anyone who has a website or app process (such as a signup or login) that does something like:

• Sends a confirmation code to the customer's email or SMS phone
• Customer must enter that code back on the website/app

Have you wanted to test that better/easier?

I'm asking because we have figured this out for some existing customers of our testing platform at Testery.io, and we're wondering how big the opportunity for this might be.