How to connect Firebase to Expo Go and after that connect to complete app?

Hello, expo team and community! How I can connect Firebase to Expo Go and after that to complete app? For example, I have started to create a project, which I want to test on Expo GO. I use command: “npm i -S firebase”. And then I want to use some function like: “firebases.auth()…” but Expo Go does not see this function → typeerror: _app.firebase.auth is not a function. (In ‘_app.firebase.auth()’, '_app.firebase.auth is undefined). What should I do? Commands for conntect Firebase to Expo Go and Firebase to complete app(apk.) are different or same?
This code App.js:

import { StatusBar } from 'expo-status-bar';
import React from 'react';
import { StyleSheet, Text, View } from 'react-native';

//import * as firebase from 'firebase';
//import { firebase } from '@firebase/app';
//import * as firebase from '@firebase/app';
import {firebase} from '@firebase/app';


const firebaseConfig = {
  apiKey: "",
  authDomain: "",
  projectId: "",
  storageBucket: "",
  messagingSenderId: "",
  appId: "",
  measurementId: ""
};

!firebase.apps.length ? firebase.initializeApp(firebaseConfig) : firebase.app()

import { Container, Content, Header, Form, Input, Item, Button, Label} from 'native-base';

export default class App extends React.Component {
  
  constructor(props)
  {
    super(props)

    this.state = ({
      email:'',
      password:''
    })
  }

  signUpUser = (email, password) => {

    try{
      if(this.state.password.length < 6)
      {
        alert("Please, enter atleast 6 characters");
        this.return;
      }

      firebase.auth().createUserWithEmailAndPassword(email, password);

    }
    catch(error){
      console.log(error.toString());
    }
  }
  
  loginUser = (email, password) => {
    
  }
  render(){
    return (
      <Container style={styles.container}>
        <Form>
          <Item floatingLabel>
            <Label>Email</Label>
            <Input
              autoCorrect = {false}
              autoCapitalize = "none"
              onChangeText = {(email) => this.setState({email})}
              />
          </Item>
          <Item floatingLabel>
            <Label>Password</Label>
            <Input
              secureTextEntry = {true}
              autoCorrect = {false}
              autoCapitalize = "none"
              onChangeText = {(password) => this.setState({password})}
              />
          </Item>

          <Button style={{marginTop: 10}}
            full
            rounded
            success
            onPress = {() => this.loginUser(this.state.email, this.state.password)}
          >
          <Text style = {{color: '#fff'}}>Login</Text>
          </Button>

          <Button style={{marginTop: 10}}
            full
            rounded
            primary
            onPress = {() => this.signUpUser(this.state.email, this.state.password)}
          >
          <Text style = {{color: '#fff'}}>Sign Up</Text>
          </Button>

        </Form>
      </Container>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#fff',
    justifyContent: 'center',
    padding: 10
  },
});

P.S. I have hidden some data from firebaseConfig.