finish and commented

vault.js

@@ -1,4 +1,26 @@
 'use strict';
 module.exports = function() {
-
+    //define an object
+    var obj = {};
+
+    //creates a function setValue that sets the objects key equal to its value.
+  function setValue (key, value){
+    obj[key] = value;
+  }
+  function getValue(key){
+//if the key is undefined OR if the key's value does not exists then return null
+    if(key === undefined || !obj[key] ){
+        return null;
+    }
+//else return the key's corresponding value
+    else{
+        return obj[key];
+    }
+  }
+  //return the functions
+  return{
+      setValue: setValue,
+      getValue: getValue
+  }
+
 };