index.js

//store/index.js

import { createStore} from 'redux'
import reducers from './reducers'

const store = createStore(reducers)

export default store

indexStore.js

//store/reducers/index.js

import { combineReducers} from 'redux'
import login from './login_reducer'

export default combineReducers({

    login
})

login_reducer.js

//store/reducers/login_reducers.js

export default reducer = (state = [], action) => {
    if (action.type === 'LOGIN_RESULT') {
        return action
    } 
    return state
}

const action = {
    type: "LOGIN_RESULT",
    sessionID: action.sessionID,
    mensajeError: action.mensajeError
}