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  2. Implementing federated login with social identity providers through Cognito

How do I implement federated login with social identity providers through Cognito?

In this guide, we will implement federated login with social identity providers using AWS Cognito. This involves setting up a Cognito User Pool and configuring an Identity Provider (IdP) such as Google. We will use Pulumi to define and deploy the necessary resources.

Key Points

  • Create a Cognito User Pool to manage user authentication.
  • Configure a Cognito Identity Provider to integrate with a social login provider (e.g., Google).
  • Use Pulumi to manage the infrastructure as code.
import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

// Create a Cognito User Pool
const userPool = new aws.cognito.UserPool("userPool", {
    name: "example-user-pool",
    autoVerifiedAttributes: ["email"],
    passwordPolicy: {
        minimumLength: 8,
        requireLowercase: true,
        requireNumbers: true,
        requireSymbols: true,
        requireUppercase: true,
    },
    mfaConfiguration: "OFF",
});

// Create a Cognito User Pool Client
const userPoolClient = new aws.cognito.UserPoolClient("userPoolClient", {
    userPoolId: userPool.id,
    generateSecret: false,
    callbackUrls: ["https://example.com/callback"],
    logoutUrls: ["https://example.com/logout"],
    allowedOauthFlows: ["code"],
    allowedOauthScopes: ["email", "openid", "profile"],
    supportedIdentityProviders: ["COGNITO", "Google"],
});

// Configure Google as an Identity Provider
const googleIdentityProvider = new aws.cognito.IdentityProvider("googleIdentityProvider", {
    userPoolId: userPool.id,
    providerName: "Google",
    providerType: "Google",
    providerDetails: {
        client_id: "your-google-client-id",
        client_secret: "your-google-client-secret",
        authorize_scopes: "openid email profile",
    },
    attributeMapping: {
        email: "email",
        given_name: "given_name",
        family_name: "family_name",
    },
});

// Export the User Pool ID and Client ID
export const userPoolId = userPool.id;
export const userPoolClientId = userPoolClient.id;

Summary

In this guide, we created a Cognito User Pool and configured a User Pool Client. We then set up Google as an Identity Provider for federated login. Pulumi was used to manage and deploy these resources. This setup allows users to log in to your application using their Google credentials.

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