Fix error handler in graphql client

Author: 5n00p4eg

.changeset/pretty-geese-look.md

@@ -0,0 +1,7 @@
+---
+"@shopify/shopify-api": patch
+"@shopify/admin-api-client": patch
+"@shopify/graphql-client": patch
+---
+
+Fix type error in graphql error handler

packages/shopify-api/lib/clients/admin/graphql/client.ts

@@ -122,7 +122,14 @@ export class GraphqlClient {
     });
 
     if (response.errors) {
-      const fetchResponse = response.errors.response!;
+      const fetchResponse = response.errors.response;
+
+      if (!fetchResponse) {
+        throw new ShopifyErrors.GraphqlQueryError({
+          message: 'fetch api exception',
+          response: response as Record<string, any>,
+        });
+      }
       throwFailedRequest(response, fetchResponse, (options?.retries ?? 0) > 0);
     }