Get Current User Id in Lightning Web Component

UserDetails.html: 

<template>

<div class="slds-text-heading_large slds-text-align_center">

   User Id : {currentUserId}

    </div>

</template>

UserDetails.js: 

import { LightningElement } from 'lwc'; 

import strUserId from '@salesforce/user/Id'




export default class UserDetails extends LightningElement { 

 userId = strUserId 




}