AWS Cognito is a fully managed service that provides user authentication and authorization for web and mobile applications. It allows you to create user pools, which are user directories used to manage sign-up and sign-in functionality, as well as user attributes and settings.

When using AWS Cognito, you might need to update a user's email address for various reasons, such as when a user requests to change their email or when an administrator needs to modify a user's email address.

To update a user's email, you can make use of the AdminUpdateUserAttributesCommand provided by the AWS JavaScript SDK version 3 for Cognito Identity Provider. This command allows you to update one or more user attributes for a user in the user pool. In this case, you'll specifically update the email attribute.

The code example provided demonstrates how to perform this update using the SDK. It initializes an instance of the CognitoIdentityProviderClient with the appropriate configuration, including the region where your user pool is located. It then defines a function, updateEmail, that takes a user ID and a new email address as input.

Within the updateEmail function, the AdminUpdateUserAttributesCommand is constructed with the necessary parameters, including the user pool ID, the user ID, and the new email attribute value. The command is then sent using the AWS SDK client, and the response is logged if the update is successful. Any errors encountered during the process are also logged.

The code also demonstrates how to set up credentials for the AWS SDK client using the fromCognitoIdentityPool function from the @aws-sdk/credential-provider-cognito-identity package. This ensures that the client is authenticated to perform the necessary API requests against the Cognito service.

Remember to replace the placeholder values in the code with the actual values specific to your AWS Cognito configuration, such as the region, user pool ID, identity pool ID, user ID, and Cognito token.

Update a user's email using the AWS JavaScript SDK version 3:

To update a user's email using the AWS JavaScript SDK version 3 (@aws-sdk/client-cognito-identity-provider), you can utilize the AdminUpdateUserAttributesCommand from the SDK. Here's an example of how you can achieve this:

const { CognitoIdentityProviderClient, AdminUpdateUserAttributesCommand } = require("@aws-sdk/client-cognito-identity-provider");

const client = new CognitoIdentityProviderClient({ region: "YOUR_REGION" });

async function updateEmail(userId, email) {

    const command = new AdminUpdateUserAttributesCommand(params);

    const response = await client.send(command);

    console.log("Email updated successfully");

    console.error("Error updating email:", error);

updateEmail("USER_ID", "new_email@example.com");

Make sure to replace the following values in the code:

1. "YOUR_REGION": Replace with the appropriate AWS region where your user pool is located (e.g., "us-east-1").

2. "YOUR_USER_POOL_ID": Replace with the ID of your AWS Cognito user pool.

3. "USER_ID": Replace with the unique identifier of the user whose email you want to update.

4. "new_email@example.com": Replace with the new email address you want to set for the user.

Here are additional the code that includes the necessary AWS SDK imports:

Here's the additional code that includes the necessary AWS SDK imports and additional details:

const { fromCognitoIdentityPool } = require("@aws-sdk/credential-provider-cognito-identity");

const client = new CognitoIdentityProviderClient({

    identityPoolId: "YOUR_IDENTITY_POOL_ID",

      "cognito-idp.YOUR_REGION.amazonaws.com/YOUR_USER_POOL_ID": "COGNITO_TOKEN",

Make sure to replace the following additional values in the code:

Updating user email in AWS Cognito using JavaScript SDK v3, AdminUpdateUserAttributesCommand. Simplifies modifying user attributes for email updates.

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