text: import {applyMiddleware, combineReducers, createStore} from 'redux'
  import thunk from 'redux-thunk'
  import { userReducer } from './userReducer'
  import { quizReducer } from './quizReducer'
  import { historyReducer } from './historyReducer'
  
  const rootReducer = combineReducers({user: userReducer, quiz: quizReducer, history: historyReducer})
  
  export const store = createStore(rootReducer, applyMiddleware(thunk))