First, we need to create a library for authentication so that if a new application wants to reuse it, it can just use our auth library and update it if required:

> ng g library auth
 ? In which directory should the library be generated?
 ? What framework should this library use? Angular [ 
  https://angular.io/ ]
 ? Which stylesheet format would you like to use? SCSS [ 
  http://sass-lang.com ]
 ? Which tags would you like to add to the library? (used for linting)
 ? Which Unit Test Runner would you like to use for the library? Jest  
  [https://jestjs.io/]

Now, let's include AuthModule in our es-admin application's AppModule:

import { AuthModule } from '@ngprojects/auth';

@NgModule({
    ...
    imports: [
       ...
        AuthModule,
    ],
    ...
})
export class AppModule {}