implemented routes and error messages in login page

src/app/pages/groups/groups.component.ts

@@ -0,0 +1,16 @@
+import {Component, OnInit} from '@angular/core';
+
+@Component({
+    selector: 'app-groups',
+    templateUrl: './groups.component.html',
+    styleUrls: ['./groups.component.scss'],
+})
+export class GroupsComponent implements OnInit {
+
+    constructor() {
+    }
+
+    ngOnInit() {
+    }
+
+}