Added login states and route redirect

app/router.js

@@ -7,6 +7,6 @@ export default class Router extends EmberRouter {
 }
 
 Router.map(function() {
-  this.route('login', { path: '/' });
+  this.route('login');
   this.route('dashboard');
 });

app/routes/application.js

@@ -0,0 +1,22 @@
+import Route from '@ember/routing/route';
+import { inject as service } from '@ember/service';
+
+export default class ApplicationRoute extends Route {
+  @service session;
+  @service router;
+
+  async beforeModel() {
+    await this.session.setup();
+
+    // If user is authenticated and trying to access the root or login route,
+    // redirect them to dashboard
+    if (this.session.isAuthenticated) {
+      const currentRouteName = this.router.currentRouteName;
+      if (currentRouteName === 'login' || currentRouteName === 'index' || currentRouteName === null) {
+        this.router.transitionTo('dashboard');
+      }
+    }else{
+        this.router.transitionTo('login');
+    }
+  }
+}