deguapp/frontend/app/(app)/index.js

import { Text, View } from "react-native";

import { useAuth } from "../context/AuthContext";

export default function Index() {
  const { onLogout, authState } = useAuth();

  const user = authState.user;

  return (
    <View style={{ flex: 1, justifyContent: "center", alignItems: "center" }}>
      <Text>Welcome {user.username}</Text>
      <Text
        onPress={() => {
          // The `app/(app)/_layout.tsx` will redirect to the sign-in screen.
          onLogout();
        }}
      >
        Sign Out
      </Text>
    </View>
  );
}