Admin and user (multiple auth)

any can help me?
how to set admin and user login go to the different page.

userservice.ts

import { Http } from ‘@angular/http’;
import { Injectable } from ‘@angular/core’;
import * as firebase from ‘firebase’;

/*
Generated class for the UserserviceProvider provider.

See https://angular.io/guide/dependency-injection for more info on providers
and Angular DI.
*/
@Injectable()
export class UserserviceProvider {

public data: any;
public fireAuth: any;
public userProfile: any;

constructor(public http: Http) {

this.fireAuth = firebase.auth();

this.userProfile = firebase.database().ref('users');

}

loginUserService(email: string, password: string): any {
return this.fireAuth.signInWithEmailAndPassword(email, password);
} //call firebase

signupUser(account: {}): Promise {
return firebase.auth().createUserWithEmailAndPassword(account[‘email’], account[‘password’]).then(newUser => {
firebase.database().ref(userProfile/${firebase.auth().currentUser.uid}).set(account);
});
}

}

home.ts ( login page)

import { Component } from ‘@angular/core’;
import { NavController, NavParams, LoadingController, ToastController } from ‘ionic-angular’;
import { UserserviceProvider } from ‘…/…/providers/userservice/userservice’;
import { RegisterPage } from ‘…/register/register’;
import { FirstpagePage } from ‘…/firstpage/firstpage’;

@Component({
selector: ‘page-home’,
templateUrl: ‘home.html’,
providers: [UserserviceProvider]
})
export class HomePage {

public email: string;
public password: string;

constructor(public usersService : UserserviceProvider,
public loadingCtrl: LoadingController, public toastCtrl: ToastController,
public navCtrl: NavController, public navParams: NavParams) {
}

signIn(){

var that = this;

var loader = this.loadingCtrl.create({
      content: "Please wait..."
    });
    loader.present();


    this.usersService.loginUserService(this.email, this.password).then(authData => {
      //successful
      loader.dismiss();
      that.navCtrl.setRoot(FirstpagePage);

    }, error => {
loader.dismiss();
     // Unable to log in
      let toast = this.toastCtrl.create({
        message: error,
        duration: 3000,
        position: 'top'
      });
      toast.present();

that.password = ""//empty the password field

    });

}

resetPwd(){}

register(){
this.navCtrl.push(RegisterPage);
}

}

please help me anybody