[AC-2947] Fix provider account credit display (#4590)

* Fix provider account credit

* Fix test

src/Api/Billing/Models/Responses/ProviderSubscriptionResponse.cs

@@ -11,7 +11,7 @@ public record ProviderSubscriptionResponse(
     decimal? DiscountPercentage,
     string CollectionMethod,
     IEnumerable<ProviderPlanResponse> Plans,
-    long AccountCredit,
+    decimal AccountCredit,
     TaxInformation TaxInformation,
     DateTime? CancelAt,
     SubscriptionSuspension Suspension)
@@ -42,13 +42,15 @@ public record ProviderSubscriptionResponse(
                     cadence);
             });
 
+        var accountCredit = Convert.ToDecimal(subscription.Customer?.Balance) * -1 / 100;
+
         return new ProviderSubscriptionResponse(
             subscription.Status,
             subscription.CurrentPeriodEnd,
             subscription.Customer?.Discount?.Coupon?.PercentOff,
             subscription.CollectionMethod,
             providerPlanResponses,
-            subscription.Customer?.Balance ?? 0,
+            accountCredit,
             taxInformation,
             subscription.CancelAt,
             subscriptionSuspension);

test/Api.Test/Billing/Controllers/ProviderBillingControllerTests.cs

@@ -323,7 +323,7 @@ public class ProviderBillingControllerTests
                     City = "Example Town",
                     State = "NY"
                 },
-                Balance = 100000,
+                Balance = -100000,
                 Discount = new Discount { Coupon = new Coupon { PercentOff = 10 } },
                 TaxIds = new StripeList<TaxId> { Data = [new TaxId { Value = "123456789" }] }
             },
@@ -404,7 +404,7 @@ public class ProviderBillingControllerTests
         Assert.Equal(100 * enterprisePlan.PasswordManager.ProviderPortalSeatPrice, providerEnterprisePlan.Cost);
         Assert.Equal("Monthly", providerEnterprisePlan.Cadence);
 
-        Assert.Equal(100000, response.AccountCredit);
+        Assert.Equal(1000.00M, response.AccountCredit);
 
         var customer = subscription.Customer;
         Assert.Equal(customer.Address.Country, response.TaxInformation.Country);