App.js

import React from "react";
import { NavigationContainer } from "@react-navigation/native";
import RootStackScreen from "./src/navigation/RootNavigator";
import { AuthContext } from "./src/context/context";

export default function App() {
  const [isLoading, setIsLoading] = React.useState(true);
  const [userToken, setUserToken] = React.useState(null);

  const authContext = React.useMemo(() => {
    return {
      signIn: () => {
        setIsLoading(false);
        setUserToken("asdf");
      },
      signUp: () => {
        setIsLoading(false);
        setUserToken("asdf");
      },
      signOut: () => {
        setIsLoading(false);
        setUserToken(null);
      },
    };
  }, []);

  React.useEffect(() => {
    setTimeout(() => {
      setIsLoading(false);
    }, 1000);
  }, []);

  return (
    <AuthContext.Provider value={authContext}>
      <NavigationContainer>
        <RootStackScreen userToken={userToken} />
      </NavigationContainer>
    </AuthContext.Provider>
  );
}