Error codes
If a request requires MFA and the user hasn’t completed it, Privy returns a401 with one of these error codes:
Retry with a new user key that records the MFA. Resending the same signed request fails again.
The React SDK handles both errors for you. It prompts the user to enroll or verify, then retries the request. With a server SDK, verify or enroll the user, then retry with the new MFA token. See authorizing actions.

