kfmc_website/src/app/shared/auth-guard.service.ts

import { AuthServiceService } from './auth-service.service';
import { Injectable } from '@angular/core';
import { Router, CanActivate } from '@angular/router';
import { Location } from '@angular/common';

@Injectable({
  providedIn: 'root'
})

export class AuthGuardService {

  constructor(public auth: AuthServiceService,
     private location: Location,
      public router: Router) {}

  canActivate(): boolean {
    if (this.auth.isAuthenticated()) {
      this.router.navigate(['/login']);
      return false;
    }
    return true;
  }

}