Connect sign-up to Sendico Facts intake (#46)

frontend/packages/sxchnge_auth/lib/src/services/instrumented.dart

@@ -60,6 +60,7 @@ class InstrumentedAuthServices
           AuthError.invalidCredentials => JourneyFailure.invalidCredentials,
           AuthError.emailInUse => JourneyFailure.emailInUse,
           AuthError.unavailable => JourneyFailure.unavailable,
+          AuthError.signupNeedsAssistance => JourneyFailure.unavailable,
           AuthError.unexpected => JourneyFailure.unexpected,
           AuthError.factorLocked ||
           AuthError.factorCooldown => JourneyFailure.unavailable,
@@ -69,6 +70,7 @@ class InstrumentedAuthServices
           VerificationError.expired => JourneyFailure.expired,
           VerificationError.invalid => JourneyFailure.invalid,
           VerificationError.internal => JourneyFailure.internal,
+          VerificationError.needsAssistance => JourneyFailure.unavailable,
         },
         FactorException(code: FactorError.expired) => JourneyFailure.expired,
         FactorException() => JourneyFailure.unavailable,