feat: introduced Authentification Context

app/(tabs)/_layout.tsx

@@ -1,15 +1,22 @@
 import { Tabs } from "expo-router/tabs";
-import {StyleSheet, View} from "react-native"
+import {StyleSheet, View, Text} from "react-native"
 
 import { FontAwesome } from "@expo/vector-icons";
 import {useThemeColor} from "../../hooks/hooks";
-import React from "react";
+import React, { useEffect } from "react";
+import { Redirect } from "expo-router";
+import { useAuth } from "../contexts/AuthContext";
 
 export default function Layout() {
     // const selectedColor: string = useThemeColor( "tabIconSelected");
     // const defaultColor: string = useThemeColor("tabIconDefault");
     // const backgroundColor: string = useThemeColor("backgroundColor");
     // const tabBarColor: string = useThemeColor("tabBarColor");
+    const {authState} = useAuth()
+    useEffect(()=>{
+        console.log(authState, "in root Layout")
+    },[authState])
+
 
     const styles = StyleSheet.create({
         sceneContainer: {
@@ -27,6 +34,11 @@ export default function Layout() {
             tabBarStyle: styles.tabBar,
     }
 
+    if(!authState?.authenticated){
+        return (
+        <Redirect href={"/"} />)
+    }
+
     return (
         <Tabs sceneContainerStyle={styles.sceneContainer} screenOptions={screenOptions}>
             <Tabs.Screen name="budget/index" options={