text: import {
    AUTH_USER,
    UNAUTH_USER,
    AUTH_ERROR,
    FETCH_MESSAGE
  } from '../actions/types'
  
  export default function (state = {}, action) {
    switch (action.type) {
      case AUTH_USER:
        return { ...state, error: '', authenticated: true }
      case UNAUTH_USER:
        return { ...state, error: '', authenticated: false }
      case AUTH_ERROR:
        return { ...state, error: action.payload }
      case FETCH_MESSAGE:
        return { ...state, message: action.payload }
    }
  
    return state;
  }
  