feat(auth): implement user authentication system

backend/node_modules/async/internal/initialParams.js

@@ -0,0 +1,14 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+
+exports.default = function (fn) {
+    return function (...args /*, callback*/) {
+        var callback = args.pop();
+        return fn.call(this, args, callback);
+    };
+};
+
+module.exports = exports.default;