Show/Hide Bottom bar icons for Mobile app

I'm working on a mobile application with subscription that has two flows:

  1. Before the login: where an unregistered user can go around the app and view part of the content
  2. After the login: they get access to additional functionalities

Now in this case, my application uses a bottom bar as a means of navigation. And the structure is as follows:

  1. The unregistered user has 3 icons in bottom bar
  2. When the user logs in the bottom bar changes and now has an additional icon along with the previous 3

Now my question is:

  • Is it alright to show/hide/change the bottom bar icons depending upon the state - pre login/post login?

Some things to consider are:

  • The application is B2B
  • Using vertical drawer as navigation is not possible (dev issues)

Thanks

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