Use concrete resource name instead of generic "resource"

src/routes/volumes.js

@@ -23,7 +23,7 @@ async function load(req, res, next) {
     const [error, result] = await safe(volumes.get(req.params.id));
     if (error) return next(BoxError.toHttpError(error));
     if (!result) return next(new HttpError(404, 'Volume not found'));
-    req.resource = result;
+    req.volume = result;
     next();
 }
 
@@ -46,13 +46,13 @@ async function add(req, res, next) {
 async function get(req, res, next) {
     assert.strictEqual(typeof req.params.id, 'string');
 
-    next(new HttpSuccess(200, volumes.removePrivateFields(req.resource)));
+    next(new HttpSuccess(200, volumes.removePrivateFields(req.volume)));
 }
 
 async function del(req, res, next) {
     assert.strictEqual(typeof req.params.id, 'string');
 
-    const [error] = await safe(volumes.del(req.resource, auditSource.fromRequest(req)));
+    const [error] = await safe(volumes.del(req.volume, auditSource.fromRequest(req)));
     if (error) return next(BoxError.toHttpError(error));
     next(new HttpSuccess(204));
 }
@@ -69,7 +69,7 @@ async function list(req, res, next) {
 async function getStatus(req, res, next) {
     assert.strictEqual(typeof req.params.id, 'string');
 
-    const [error, status] = await safe(volumes.getStatus(req.resource));
+    const [error, status] = await safe(volumes.getStatus(req.volume));
     if (error) return next(BoxError.toHttpError(error));
     next(new HttpSuccess(200, status));
 }