The value can be obtained in the constructor function, but TypeError: Cannot read property'xxx' of undefined is output in the render function

In console.log (data ["users"] ["userId"] ["points"]) in getData () of the code below, 20 is output.

But in render ()<Text> {JSON.stringify (this.state.users.userId.points)} </ Text>When you run

TypeError: Cannot read property'points' of undefinedError is output.

How do I {JSON.stringify (this.state.users.userId.points)} </ Text>Can it be output as 20?

import React from 'react';import { Text, View, Button, StyleSheet, TouchableHighlight, FlatList} from 'react-native';import { FloatingAction } from "react-native-floating-action";import Icon from 'react-native-vector-icons/FontAwesome5';import * as firebase from 'firebase';import 'firebase/firestore';import env from '../../env.json';interface Props {  navigation: any;  route:any;  authorId:string;  postId:string;  userId:string;  win:string;  wni:string;  ideas:any;  }  interface State {    actions:{      text:string,      icon:JSX.Element,      name:string,      position:number    }[],    data:any,    points:number    users:any  }  const firebaseConfig = {    apiKey: env.apiKey,    authDomain: env.authDomain,    databaseURL: env.databaseURL,    projectId: env.projectId,    storageBucket: env.storageBucket,    messagingSenderId: env.messagingSenderId,    appId: env.appId,    measurementId: env.measurementId  };  if (firebase.apps.length === 0) {    firebase.initializeApp(firebaseConfig);  }  const db = firebase.firestore();  export class Rank extends React.Component<Props,State> {      constructor(props){          super(props)          this.state = {            actions:[              {                text: "Write down features",                icon: <Icon name="list" size={20}/>,                name: "feature",                position: 2              },              {                text: "Post your idea",                icon: <Icon name="lightbulb" size={20}/>,                name: "idea",                position: 1              }            ],            data:{},            points:0,            users:{}          }          this.getData()      }      async getData(){        let firestoreData = await db.collection("posts").doc(this.props.route.params.postId).get()        let data = firestoreData.data()        this.setState({          data:data,          users:data["users"]        })        console.log(data["users"]["userId"]["points"])      }      render(){        return (<View            style={styles.backgroundImage}><Text>{JSON.stringify(this.state.users.userId.points)}</Text></View>        )      }  }  const styles = StyleSheet.create({    backgroundImage: {        ...StyleSheet.absoluteFillObject,      },  })