* Respond with the TAF's code of whether Authenticated, or suggested next steps
* default is either IS_AUTHENTICATED, or TRY_ANOTHER_TAF. The TAF can overload
* and suggest others, such as "NO_FURTHER_PROCESSING", if it can detect that this
* Respond with the TAF's code of whether Authenticated, or suggested next steps
* default is either IS_AUTHENTICATED, or TRY_ANOTHER_TAF. The TAF can overload
* and suggest others, such as "NO_FURTHER_PROCESSING", if it can detect that this