fix async request porcessing

Author: KSDaemon

packages/cubejs-api-gateway/src/gateway.ts

@@ -1834,10 +1834,10 @@ class ApiGateway {
       if (props.queryType === 'multi') {
         // We prepare the final json result on native side
         const resultMulti = new ResultMultiWrapper(results, { queryType, slowQuery });
-        res(resultMulti);
+        return res(resultMulti);
       } else {
         // We prepare the full final json result on native side
-        res(results[0]);
+        return res(results[0]);
       }
     } catch (e: any) {
       this.handleError({
@@ -1936,7 +1936,7 @@ class ApiGateway {
           }];
         }
 
-        res(request.streaming ? results[0] : { results });
+        return res(request.streaming ? results[0] : { results });
       } else {
         results = await Promise.all(
           normalizedQueries.map(async (normalizedQuery, index) => {
@@ -1970,11 +1970,11 @@ class ApiGateway {
         );
 
         if (request.streaming) {
-          res(results[0]);
+          return res(results[0]);
         } else {
           // We prepare the final json result on native side
           const resultArray = new ResultArrayWrapper(results);
-          res(resultArray);
+          return res(resultArray);
         }
       }
     } catch (e: any) {