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

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

@@ -63,6 +63,7 @@ class BackendAuthServices
     String path,
     Map<String, Object?> body, {
     bool factor = false,
+    bool verification = false,
   }) async {
     try {
       final uri = baseUri.replace(
@@ -81,6 +82,7 @@ class BackendAuthServices
           .timeout(const Duration(seconds: 15));
       final dto = BackendDTO.decode(res.body);
       if (res.statusCode < 200 || res.statusCode >= 300) {
+        if (verification) throw BackendMapper.verificationFailure(dto);
         throw factor
             ? BackendMapper.factorFailure(res.statusCode, dto)
             : BackendMapper.authFailure(res.statusCode, dto);
@@ -90,7 +92,11 @@ class BackendAuthServices
       rethrow;
     } on FactorException {
       rethrow;
+    } on VerificationException {
+      rethrow;
     } catch (_) {
+      if (verification)
+        throw const VerificationException(VerificationError.internal);
       if (factor) throw const FactorException(FactorError.unavailable);
       throw const AuthException(AuthError.unavailable);
     }
@@ -148,16 +154,17 @@ class BackendAuthServices
       await _post('verification/send', {
         'email': normalized,
         'idempotencyKey': key,
-      }, factor: true);
+      }, verification: true);
       _retryKeys.remove('activation:$normalized');
       return VerificationMapper.fromDTO(
         const VerificationDTO(simulated: false),
       );
-    } on FactorException catch (e) {
-      if (e.code == FactorError.expired || e.code == FactorError.invalid) {
+    } on VerificationException catch (e) {
+      if (e.code == VerificationError.expired ||
+          e.code == VerificationError.invalid) {
         _retryKeys.remove('activation:$normalized');
       }
-      throw const VerificationException(VerificationError.internal);
+      rethrow;
     } catch (_) {
       throw const VerificationException(VerificationError.internal);
     }
@@ -165,18 +172,8 @@ class BackendAuthServices
 
   @override
   Future<VerificationResult> confirm({required String token}) async {
-    try {
-      await _post('verification/confirm', {'token': token}, factor: true);
-      return VerificationMapper.fromDTO(
-        const VerificationDTO(simulated: false),
-      );
-    } on FactorException catch (e) {
-      throw VerificationException(switch (e.code) {
-        FactorError.expired => VerificationError.expired,
-        FactorError.invalid => VerificationError.invalid,
-        _ => VerificationError.internal,
-      });
-    }
+    await _post('verification/confirm', {'token': token}, verification: true);
+    return VerificationMapper.fromDTO(const VerificationDTO(simulated: false));
   }
 
   @override