if another tab from the same browser logged in as a different user, we logout others.

src/app/app.component.ts

 import { Component, OnDestroy, OnInit, ViewChild, ViewEncapsulation } from '@angular/core';
 import { Subscription } from 'rxjs';
 import { LoanEditComponent } from './loan-edit/loan-edit.component';
-
 import { AuthService } from './service/auth.service';
 import { MenuService } from './service/menu.service';
-
 import {WebSocketService} from './websocket';
-import {AppConfig} from './app.config';
 import {Title} from '@angular/platform-browser';
+import {WsLoginEventModel} from './models/websocket/ws.login.event.model';
+import {SessionService} from './service/session.service';
 
 @Component({
   selector: 'app-root',
 
   constructor(private menuService: MenuService,
               private authService: AuthService,
-              private config: AppConfig,
+              private ss: SessionService,
               private wsService: WebSocketService,
               private titleService: Title){
     this.webSocketSubscription = wsService.subscribe(m => {
     });
 
     this.wsLoginSub = this.wsService.LoginEvent.subscribe( m => {
-      console.log('login event ', m);
+      this.onWSLogin(m);
     });
 
     this.titleService.setTitle(this.title);
 
   listenToMenuEvent(): void {
     this.menuItemSub = this.menuService.itemClicked.subscribe(
-      (item:any) =>{
+      (item: any) => {
         // console.log("emit on select : " + item.text);
         if ( item.popup ===  'loanEdit'){
-//          this.loanEdit.somedata = '' + Math.random() + 'changed';
-//          this.loanEdit.open('dialog');
         }
       }
     );
-
   }
 
   ngOnDestroy(): void {
     this.wsLoginSub.unsubscribe();
   }
 
+  onWSLogin(e: WsLoginEventModel): void {
+    if ( e.Mid === this.ss.loggedIn.machineId && e.Sid === this.ss.loggedIn.session ){
+       if ( e.Uid !== this.ss.loggedIn.User.Id && e.Uid !== '') {
+         this.ss.logout();
+       }
+    }
+  }
+
 }