feat(auth): implement user authentication system

backend/node_modules/prompts/dist/dateparts/milliseconds.js

@@ -0,0 +1,28 @@
+'use strict';
+
+const DatePart = require('./datepart');
+
+class Milliseconds extends DatePart {
+  constructor(opts = {}) {
+    super(opts);
+  }
+
+  up() {
+    this.date.setMilliseconds(this.date.getMilliseconds() + 1);
+  }
+
+  down() {
+    this.date.setMilliseconds(this.date.getMilliseconds() - 1);
+  }
+
+  setTo(val) {
+    this.date.setMilliseconds(parseInt(val.substr(-this.token.length)));
+  }
+
+  toString() {
+    return String(this.date.getMilliseconds()).padStart(4, '0').substr(0, this.token.length);
+  }
+
+}
+
+module.exports = Milliseconds;