src/features/auth/authSlice.ts

import { createSlice } from '@reduxjs/toolkit'
import { useAuth0 } from '@auth0/auth0-react'

const authSlice = createSlice({
 name: 'auth',
 initialState: {
    isAuthenticated: false
 },
 reducers: {
    login(state) {
      state.isAuthenticated = true
    },
    logout(state) {
      state.isAuthenticated = false
    }
 }
})

export const { login, logout } = authSlice.actions

export default authSlice.reducer