@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 Security Token Service (STS) to access temporary, limited-privilege Amazon Web Services 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 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

$3

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 ListIdentityPoolsCommand:

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

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

$3

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.

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

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

#### Async/await

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

`js
// 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.

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

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

`js
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.

`js
// 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

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

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

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

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

$3

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

`js
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.

Client Commands (Operations List)

CreateIdentityPool

Command API Reference / Input / Output

DeleteIdentities

Command API Reference / Input / Output

DeleteIdentityPool

Command API Reference / Input / Output

DescribeIdentity

Command API Reference / Input / Output

DescribeIdentityPool

Command API Reference / Input / Output

GetCredentialsForIdentity

Command API Reference / Input / Output

GetId

Command API Reference / Input / Output

GetIdentityPoolRoles

Command API Reference / Input / Output

GetOpenIdToken

Command API Reference / Input / Output

GetOpenIdTokenForDeveloperIdentity

Command API Reference / Input / Output

GetPrincipalTagAttributeMap

Command API Reference / Input / Output

ListIdentities

Command API Reference / Input / Output

ListIdentityPools

Command API Reference / Input / Output

ListTagsForResource

Command API Reference / Input / Output

LookupDeveloperIdentity

Command API Reference / Input / Output

MergeDeveloperIdentities

Command API Reference / Input / Output

SetIdentityPoolRoles

Command API Reference / Input / Output

SetPrincipalTagAttributeMap

Command API Reference / Input / Output

TagResource

Command API Reference / Input / Output

UnlinkDeveloperIdentity

Command API Reference / Input / Output

UnlinkIdentity

Command API Reference / Input / Output

UntagResource

Command API Reference / Input / Output

UpdateIdentityPool

Command API Reference / Input / Output