[+] Import login comp. in app.ts

src/components/app/app.ts

@@ -1,7 +1,8 @@
 import {Component, Vue} from 'vue-property-decorator';
+import Login from '@/components/login/login';
 
 @Component({
-    components: {},
+    components: {Login},
 })
 export default class App extends Vue
 {