Refactor utils and organize routes/schema

schema/user.model.js

@@ -0,0 +1,25 @@
+const mongoose = require('mongoose');
+const Schema = mongoose.Schema;
+
+// Database schema for a user
+let User = new Schema({
+    email: {
+        type: String
+    },
+    name: {
+        type: String
+    },
+    password: {
+        type: String
+    },
+    permission: {
+        type: Number
+    },
+    favorites: {
+        type: Array
+    }
+}, {
+    collection: 'users'
+});
+
+module.exports = mongoose.model('User', User);