Facebook auth using Ionic5 Angular & capacitor : Is it possible to have different type of user s?

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I have the following code that allows me to sign in via Facebook on my Ionic Angular (Capacitor) firebase App :

async signIn(): Promise<void> {
    const FACEBOOK_PERMISSIONS = ['public_profile', 'email'];

    const result = await Plugins.FacebookLogin.login({ permissions: FACEBOOK_PERMISSIONS });
    if (result && result.accessToken) {
      let user = { token: result.accessToken.token, userId: result.accessToken.userId }
      let navigationExtras: NavigationExtras = {
        queryParams: {
          userinfo: JSON.stringify(user)
        }
      };
      this.router.navigate(["/feed"], navigationExtras);
    }
  }

I followed a tutorial so I do not understand everything in this piece of code, I do know the steps it takes and I have a global understanding of it.

I’m looking for two things :

  • Retrieve data from my user’s facebook. I do believe it is in "userinfo" but im not sure. And if it is, what is the syntax to get them ?
  • How can I have types of users using this kind of auth ? Or do I have to create a separate system using firebase’s realtime database ? I would like to have administrators & basic users. So I can display an administration pannel.

Since I’m new to this technology (2 days lol), I’m pretty clueless on what step I should take now.
I know this is not a code issue but I do not know where to post it. I’m sorry.

Source: Angular Questions