AuthNavigation.js

import React from "react";

// Benim react-navigator sürümü bu yapıya izin veriyor sende izin vermez ise react-navigation-stack yüklemen lazım
import { createStackNavigator} from 'react-navigation'; 
import Icon from 'react-native-vector-icons/Ionicons';

/////////SCREENS//////////
import WelcomeScreen from "../screens/Auth/welcomeScreen";
/////////////////////////

const WelcomeStack = createStackNavigator({
    WelcomeScreen
});

export const AuthNavigator = createStackNavigator({
    WelcomeStack,
},{
    initialRouteName:'WelcomeStack',
    header: null,
    headerMode: 'none'
})