reducers.js

import {composeReducers, makeReducer, makeAsyncReducer} from 'redux-toolbelt'
import { loadCustomers, loadOrders, loadProfile, changeUserName, logout } from './actions'

export default composeReducers(
  {
    profile: makeAsyncReducer(loadProfile),
    customers: makeAsyncReducer(loadCustomers),
    orders: makeAsyncReducer(loadOrders)
  }, 
  makeReducer(logout, (state, {type, payload}) => ({
    ...state,
    profile: { loading: false, data: null },
    customers: { loading: false, data: null },
    orders: { loading: false, data: null }
  })
)