Removes second log when responding with a regular error

src/PromiseRouter.js

@@ -181,7 +181,7 @@ function makeExpressHandler(appId, promiseHandler) {
           })
         }
         res.json(result.response);
-      }, (e) => {
+      }, (error) => next(error)).catch((e) => {
         log.error(`Error generating response. ${inspect(e)}`, {error: e});
         next(e);
       });

src/middlewares.js

@@ -1,9 +1,9 @@
 import AppCache from './cache';
-import log from './logger';
 import Parse from 'parse/node';
 import auth from './Auth';
 import Config from './Config';
 import ClientSDK from './ClientSDK';
+import defaultLogger from './logger';
 
 // Checks that the request is authorized for this app and checks user
 // auth too.
@@ -179,7 +179,7 @@ export function handleParseHeaders(req, res, next) {
       }
       else {
         // TODO: Determine the correct error scenario.
-        log.error('error getting auth for sessionToken', error);
+        req.config.loggerController.error('error getting auth for sessionToken', error);
         throw new Parse.Error(Parse.Error.UNKNOWN_ERROR, error);
       }
     });
@@ -267,6 +267,7 @@ export function allowMethodOverride(req, res, next) {
 }
 
 export function handleParseErrors(err, req, res, next) {
+  const log = (req.config && req.config.loggerController) || defaultLogger;
   if (err instanceof Parse.Error) {
     let httpStatus;
     // TODO: fill out this mapping