text: export const GET_TODOS = 'GET_TODOS';
  export const GET_TODO = 'GET_TODO';
  export const ADD_TODO = 'ADD_TODO';
  export const DELETE_TODO = 'DELETE_TODO';
  export const EDIT_TODO = 'EDIT_TODO';
  
  export const USER_LOADING = 'USER_LOADING';
  export const USER_LOADED = 'USER_LOADED';
  export const AUTH_ERROR = 'AUTH_ERROR';
  export const REGISTER_SUCCESS = 'REGISTER_SUCCESS';
  export const REGISTER_FAIL = 'REGISTER_FAIL';
  export const LOGIN_SUCCESS = 'LOGIN_SUCCESS';
  export const LOGIN_FAIL = 'LOGIN_FAIL';
  export const LOGOUT_SUCCESS = 'LOGOUT_SUCCESS';
  