sensor and location done and some cleanupd

testing will be required

Sean/modules/rateLimitMiddleware.js

@@ -0,0 +1,9 @@
+const rateLimit = require('express-rate-limit');
+
+const limiter = rateLimit({
+  windowMs: 15 * 60 * 1000, // 15 minutes
+  max: 5, // limit each IP to 5 requests per windowMs
+  message: 'Too many login attempts from this IP, please try again later.',
+});
+
+module.exports = limiter;