And also include them in angular_project/src/environments/environment.ts file:

step-3: . Now we nee to add or replace below code into ourangular_project/src/app/app.module.tsfile:

Process to remove firebase :

To remove firebase from the project make sure that you have to remove the auth.service.ts file in src/app/shared/auth.

In login.component.ts replace login function with

or else you can use any other authentication as per your requirement. And make sure to remove canActivate: [AdminGuard] from app-routing.module.ts. Remove the firebase-related content in app.module.ts, environment. Note: make sure to remove all AuthService from the project which can be found in the switcher, header, authentication, ect..