▿ MfaChallengeError(code: unsupported_challenge_type, message: User does not have any enrolled authenticator with the supported challenge type (oob), statusCode: 401)
  ▿ info : 2 elements
    ▿ 0 : 2 elements
      - key : "error"
      - value : unsupported_challenge_type
    ▿ 1 : 2 elements
      - key : "error_description"
      - value : User does not have any enrolled authenticator with the supported challenge type (oob)
  - code : "unsupported_challenge_type"
  - statusCode : 401

 func challenge(with authenticatorId: String, mfaToken: String) -> any Requestable<MFAChallenge, MfaChallengeError> {
        let url = URL(string: "mfa/challenge", relativeTo: self.url)!
        var payload: [String: Any] = [:]
        payload["client_id"] = clientId
        payload["challenge_type"] = "oob" <-- hard coded oob
        payload["authenticator_id"] = authenticatorId
        payload["mfa_token"] = mfaToken
        return Request(session: session,
                       url: url,
                       method: "POST",
                       handle: mfaChallengeDecodable,
                       parameters: payload,
                       logger: logger,
                       auth0ClientInfo: auth0ClientInfo)
    }