@aws-sdk/client-cognito-identity

What is @aws-sdk/client-cognito-identity?

The @aws-sdk/client-cognito-identity package is part of the AWS SDK for JavaScript (v3) and provides a client for accessing the Amazon Cognito Identity service. This service enables you to create unique identities for your users and authenticate them with identity providers. With this package, developers can integrate their applications with the Cognito Identity service to manage user identities, authentication, and access control.

What are @aws-sdk/client-cognito-identity's main functionalities?

Creating a new identity pool

This feature allows developers to create a new identity pool. An identity pool is a store of user identity data specific to your account. The code sample demonstrates how to create an identity pool using the CognitoIdentityClient.

const { CognitoIdentityClient, CreateIdentityPoolCommand } = require('@aws-sdk/client-cognito-identity');

const client = new CognitoIdentityClient({ region: 'us-east-1' });
const command = new CreateIdentityPoolCommand({
  IdentityPoolName: 'MyIdentityPool',
  AllowUnauthenticatedIdentities: false
});

const response = await client.send(command);
console.log(response);

Retrieving identity pool roles

This feature enables the retrieval of roles associated with a specific identity pool. The code sample shows how to use the CognitoIdentityClient to fetch the roles for an identity pool.

const { CognitoIdentityClient, GetIdentityPoolRolesCommand } = require('@aws-sdk/client-cognito-identity');

const client = new CognitoIdentityClient({ region: 'us-east-1' });
const command = new GetIdentityPoolRolesCommand({
  IdentityPoolId: 'us-east-1:12345678-1234-1234-1234-123456789012'
});

const response = await client.send(command);
console.log(response);

Listing identities

This feature allows for listing the identities within an identity pool. The code sample demonstrates how to list identities in an identity pool, with a maximum number of results specified.

const { CognitoIdentityClient, ListIdentitiesCommand } = require('@aws-sdk/client-cognito-identity');

const client = new CognitoIdentityClient({ region: 'us-east-1' });
const command = new ListIdentitiesCommand({
  IdentityPoolId: 'us-east-1:12345678-1234-1234-1234-123456789012',
  MaxResults: 10
});

const response = await client.send(command);
console.log(response);

Other packages similar to @aws-sdk/client-cognito-identity

amazon-cognito-identity-js

The amazon-cognito-identity-js package provides authentication functionality for Amazon Cognito. It is focused more on the client-side interaction with Cognito User Pools, enabling sign-up, sign-in, and access to user information. Compared to @aws-sdk/client-cognito-identity, it is more specialized in handling user pool operations rather than managing identities and federated identities.

aws-amplify

AWS Amplify is a comprehensive framework that includes support for Cognito among other AWS services. It provides a higher-level abstraction for working with AWS services, including authentication and authorization via Amazon Cognito. While @aws-sdk/client-cognito-identity is more focused and granular, AWS Amplify offers a broader set of tools for building cloud-enabled applications, including but not limited to authentication.

README

@aws-sdk/client-cognito-identity

Description

AWS SDK for JavaScript CognitoIdentity Client for Node.js, Browser and React Native.

Amazon Cognito Federated Identities

Amazon Cognito Federated Identities is a web service that delivers scoped temporary credentials to mobile devices and other untrusted environments. It uniquely identifies a device and supplies the user with a consistent identity over the lifetime of an application.

Using Amazon Cognito Federated Identities, you can enable authentication with one or more third-party identity providers (Facebook, Google, or Login with Amazon) or an Amazon Cognito user pool, and you can also choose to support unauthenticated access from your app. Cognito delivers a unique identifier for each user and acts as an OpenID token provider trusted by AWS Security Token Service (STS) to access temporary, limited-privilege AWS credentials.

For a description of the authentication flow from the Amazon Cognito Developer Guide see Authentication Flow.

For more information see Amazon Cognito Federated Identities.

Installing

To install the this package, simply type add or install @aws-sdk/client-cognito-identity using your favorite package manager:

• npm install @aws-sdk/client-cognito-identity
• yarn add @aws-sdk/client-cognito-identity
• pnpm add @aws-sdk/client-cognito-identity

Getting Started

Import

The AWS SDK is modulized by clients and commands. To send a request, you only need to import the CognitoIdentityClient and the commands you need, for example CreateIdentityPoolCommand:

// ES5 example
const { CognitoIdentityClient, CreateIdentityPoolCommand } = require("@aws-sdk/client-cognito-identity");

// ES6+ example
import { CognitoIdentityClient, CreateIdentityPoolCommand } from "@aws-sdk/client-cognito-identity";

Usage

To send a request, you:

• Initiate client with configuration (e.g. credentials, region).
• Initiate command with input parameters.
• Call send operation on client with command object as input.
• If you are using a custom http handler, you may call destroy() to close open connections.

// a client can be shared by different commands.
const client = new CognitoIdentityClient({ region: "REGION" });

const params = {
  /** input parameters */
};
const command = new CreateIdentityPoolCommand(params);

Async/await

We recommend using await operator to wait for the promise returned by send operation as follows:

// async/await.
try {
  const data = await client.send(command);
  // process data.
} catch (error) {
  // error handling.
} finally {
  // finally.
}

Async-await is clean, concise, intuitive, easy to debug and has better error handling as compared to using Promise chains or callbacks.

Promises

You can also use Promise chaining to execute send operation.

client.send(command).then(
  (data) => {
    // process data.
  },
  (error) => {
    // error handling.
  }
);

Promises can also be called using .catch() and .finally() as follows:

client
  .send(command)
  .then((data) => {
    // process data.
  })
  .catch((error) => {
    // error handling.
  })
  .finally(() => {
    // finally.
  });

Callbacks

We do not recommend using callbacks because of callback hell, but they are supported by the send operation.

// callbacks.
client.send(command, (err, data) => {
  // process err and data.
});

v2 compatible style

The client can also send requests using v2 compatible style. However, it results in a bigger bundle size and may be dropped in next major version. More details in the blog post on modular packages in AWS SDK for JavaScript

import * as AWS from "@aws-sdk/client-cognito-identity";
const client = new AWS.CognitoIdentity({ region: "REGION" });

// async/await.
try {
  const data = await client.createIdentityPool(params);
  // process data.
} catch (error) {
  // error handling.
}

// Promises.
client
  .createIdentityPool(params)
  .then((data) => {
    // process data.
  })
  .catch((error) => {
    // error handling.
  });

// callbacks.
client.createIdentityPool(params, (err, data) => {
  // process err and data.
});

Troubleshooting

When the service returns an exception, the error will include the exception information, as well as response metadata (e.g. request id).

try {
  const data = await client.send(command);
  // process data.
} catch (error) {
  const { requestId, cfId, extendedRequestId } = error.$$metadata;
  console.log({ requestId, cfId, extendedRequestId });
  /**
   * The keys within exceptions are also parsed.
   * You can access them by specifying exception names:
   * if (error.name === 'SomeServiceException') {
   *     const value = error.specialKeyInException;
   * }
   */
}

Getting Help

Please use these community resources for getting help. We use the GitHub issues for tracking bugs and feature requests, but have limited bandwidth to address them.

• Visit Developer Guide or API Reference.
• Check out the blog posts tagged with aws-sdk-js on AWS Developer Blog.
• Ask a question on StackOverflow and tag it with aws-sdk-js.
• Join the AWS JavaScript community on gitter.
• If it turns out that you may have found a bug, please open an issue.

To test your universal JavaScript code in Node.js, browser and react-native environments, visit our code samples repo.

Contributing

This client code is generated automatically. Any modifications will be overwritten the next time the @aws-sdk/client-cognito-identity package is updated. To contribute to client you can check our generate clients scripts.

License

This SDK is distributed under the Apache License, Version 2.0, see LICENSE for more information.

Changelog

3.245.0 (2023-01-05)

Features

• client-amplifybackend: Updated GetBackendAPIModels response to include ModelIntrospectionSchema json string (eff2ce7)
• client-apprunner: This release adds support of securely referencing secrets and configuration data that are stored in Secrets Manager and SSM Parameter Store by adding them as environment secrets in your App Runner service. (285e1c2)
• client-connect: Documentation update for a new Initiation Method value in DescribeContact API (62552ab)
• client-emr-serverless: Adds support for customized images. You can now provide runtime images when creating or updating EMR Serverless Applications. (6c6ec95)
• client-rds: This release adds support for specifying which certificate authority (CA) to use for a DB instance's server certificate during DB instance creation, as well as other CA enhancements. (c090672)