text: import {combineReducers} from 'redux';
  
   function signin(state={userId:'',userName: ''},action){
      switch(action.type) {
        case 'SignIn':
          console.log(action)
          return Object.assign({},{userName:action.userName,userId:action.userId})
        default:
          return state
      }
    }
  
  export default signin;
  