feat(auth): implement user authentication system

backend/node_modules/test-exclude/is-outside-dir-win32.js

@@ -0,0 +1,10 @@
+'use strict';
+
+const path = require('path');
+const minimatch = require('minimatch');
+
+const dot = { dot: true };
+
+module.exports = function(dir, filename) {
+    return !minimatch(path.resolve(dir, filename), path.join(dir, '**'), dot);
+};