use non-nullable types

_schemaV2.graphql

@@ -15267,10 +15267,10 @@ type PublishViewingRoomPayload {
 
 type purchases {
   # Total number of auction winning bids
-  totalAuctionCount: Int
+  totalAuctionCount: Int!
 
   # Total number of private sales
-  totalPrivateSaleCount: Int
+  totalPrivateSaleCount: Int!
 }
 
 type Query {

src/lib/stitching/exchange/v2/stitching.ts

@@ -364,11 +364,11 @@ export const exchangeStitchingEnvironment = ({
             }
           `,
           resolve: async (parent, _args, context, info) => {
-            const nonBnmoPurchases =
-              (parent?.purchases?.totalAuctionCount ?? 0) +
-              (parent?.purchases?.totalPrivateSaleCount ?? 0)
-
             try {
+              const nonBnmoPurchases =
+                (parent?.purchases?.totalAuctionCount ?? 0) +
+                (parent?.purchases?.totalPrivateSaleCount ?? 0)
+
               const exchangeArgs = {
                 buyerId: parent.userId,
               }
@@ -391,9 +391,7 @@ export const exchangeStitchingEnvironment = ({
                 error
               )
 
-              return {
-                totalPurchases: nonBnmoPurchases,
-              }
+              return { totalPurchases: null }
             }
           },
         },

src/schema/v2/conversation/collectorResume.ts

@@ -38,14 +38,14 @@ const CollectorPurchasesType = new GraphQLObjectType<any, ResolverContext>({
   name: "purchases",
   fields: {
     totalAuctionCount: {
-      type: GraphQLInt,
+      type: GraphQLNonNull(GraphQLInt),
       description: "Total number of auction winning bids",
-      resolve: ({ auction }) => auction,
+      resolve: ({ auction }) => auction || 0,
     },
     totalPrivateSaleCount: {
-      type: GraphQLInt,
+      type: GraphQLNonNull(GraphQLInt),
       description: "Total number of private sales",
-      resolve: (data) => data["private sale"],
+      resolve: (data) => data["private sale"] || 0,
     },
   },
 })