Require modules at the beginning of module

lib/cartodb/middleware/context/authorize.js

@@ -2,6 +2,7 @@ module.exports = function authorize (authApi) {
     return function authorizeMiddleware (req, res, next) {
         authApi.authorize(req, res, (err, authorized) => {
             req.profiler.done('authorize');
+
             if (err) {
                 return next(err);
             }

lib/cartodb/middleware/context/credentials.js

@@ -1,4 +1,4 @@
-'use strict';
+const basicAuth = require('basic-auth');
 
 module.exports = function credentials () {
     return function credentialsMiddleware(req, res, next) {
@@ -11,10 +11,6 @@ module.exports = function credentials () {
     };
 };
 
-//--------------------------------------------------------------------------------
-
-const basicAuth = require('basic-auth');
-
 function getApikeyCredentialsFromRequest(req) {
     let apikeyCredentials = {
         token: null,