React Native AWS Cognito JS SDK


This is an adaptation of Amazon Cognito Identity SDK for JavaScript in combination with AWS SDK for JavaScript for React Native.

This project uses Native Modules to handle intensive math operations on the device using the React Native bridge.


Install in your application directory:

npm install --save react-native-aws-cognito-js


yarn add react-native-aws-cognito-js

Link project:

react-native link react-native-aws-cognito-js


The local MemoryStorage can handle everything on the authentication side, but the data is lost when the app is reopened. The storage sync method will grab only the MemoryStorage data from AsyncStorage and update the local MemoryStage with the values.

The new sync method can be used from either the userPool or cognitoUser:, result) => {
  // MemoryStorage is now updated with AsyncStorage values

or, result) => {
  // MemoryStorage is now updated with AsyncStorage values


Refer to the Amazon Cognito Identity SDK for JavaScript usage examples.


This is a user authentication sample:

import {
} from 'aws-sdk/dist/aws-sdk-react-native';

import {
} from 'react-native-aws-cognito-js';

const appConfig = {
  region: '',
  IdentityPoolId: '',
  UserPoolId: '',
  ClientId: '',

//setting config
Config.region = appConfig.region;

state = {
  username: '',
  password: '',

login = () => {
  const { username, password } = this.state;
  const authenticationData = {
    Username: username,
    Password: password,
  const authenticationDetails = new AuthenticationDetails(authenticationData);
  const poolData = {
    UserPoolId: appConfig.UserPoolId,
    ClientId: appConfig.ClientId
  const userPool = new CognitoUserPool(poolData);
  const userData = {
    Username: username,
    Pool: userPool
  const cognitoUser = new CognitoUser(userData);
  cognitoUser.authenticateUser(authenticationDetails, {
    onSuccess: (result) => {
      console.log('access token + ' + result.getAccessToken().getJwtToken());
      Config.credentials = new CognitoIdentityCredentials({
        IdentityPoolId: appConfig.IdentityPoolId,
        Logins: {
          [`cognito-idp.${appConfig.region}${appConfig.UserPoolId}`]: result.getIdToken().getJwtToken()
    onFailure: (err) => {

Advanced Example

//- AWS.js
//create AWS with userPool using dotenv to hold environment variables
import AWS, { CognitoIdentityServiceProvider } from 'aws-sdk/dist/aws-sdk-react-native';
import * as enhancements from 'react-native-aws-cognito-js';
import { AWS_REGION, AWS_POOL_ID, AWS_POOL_CLIENT_ID } from 'react-native-dotenv';

Object.keys(enhancements).forEach(key => (CognitoIdentityServiceProvider[key] = enhancements[key]));

AWS.config.update({ region: AWS_REGION });

export const poolData = {
  UserPoolId: AWS_POOL_ID,

export const userPool = new AWS.CognitoIdentityServiceProvider.CognitoUserPool(poolData);

export default AWS;
//import AWS and userPool
import AWS, { userPool } from './AWS';

state = {
  username: '',
  password: '',

login = () => {
  const { username, password } = this.state;
  const authenticationData = { Username: username, Password: password };
  const authenticationDetails = new AWS.CognitoIdentityServiceProvider.AuthenticationDetails(authenticationData);
  const userData = { Username: username, Pool: userPool };
  const cognitoUser = new AWS.CognitoIdentityServiceProvider.CognitoUser(userData);
  cognitoUser.authenticateUser(authenticationDetails, {
    onSuccess: (result) => {
      console.log('result', result);
      console.log('access token:', result.getAccessToken().getJwtToken());
    onFailure: (error) => {
      Alert.alert(error.code, error.message);

Download Details:
Author: AirLabsTeam
Source Code:
License: Unknown and 2 other licenses found

#react  #reactnative  #mobileapp  #javascript  #backend 

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React Native AWS Cognito JS SDK
Autumn  Blick

Autumn Blick


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Reggie  Hudson

Reggie Hudson


Proficient AWS Cognito and React JS: Login [Ep. 2].

In this video, we’re going over logging in so users can log in to their account using AWS Cognito and React.

🖥️ Source code:

💡 Have a video request?
Suggest it in the Dev Ascend Discord community server or leave it in the comments below!

🕐 Timestamps:
00:00 Introduction
00:30 Creating Login.js
00:58 Importing CognitoUser and AuthenticationDetails
01:06 Adding login authentication
02:25 Testing unconfirmed login
02:42 Manually confirm user
03:22 Demo of incorrect username or password

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