essentory-login-test/app/index.tsx

import React, { useEffect, useState } from 'react';
import {Button, Text, View} from 'react-native';
import ELogo from '@components/ELogo';
import { useAuthState } from '@components/AuthProvider';
import { Redirect, useRouter } from 'expo-router';
import auth from '@react-native-firebase/auth';

export default function LoginScreen(props:any) {
  const [user, _, setLoginState, init] = useAuthState();
  const [redirect, setRedirect] = useState(false);
  const router = useRouter();
  useEffect(() => {
    if (!init) {
      if (user === null) setRedirect(true);
    }
  }, [init])
  if (redirect) {
    return <Redirect href="auth/login" />
  }
  return (
    <>
      <View
        style={{
          flex: 1,
          rowGap: 24,
          flexDirection: 'column',
          paddingTop: 345,
        }}>
        <ELogo />
        <Text style={{color: 'white'}}>{JSON.stringify(user)} , {JSON.stringify(init)}</Text>
        <Button title="Signout" onPress={async ()=> {await auth().signOut(); router.replace("auth/login")}} />
      </View>
    </>
  );
}