How can I get MAU's for a Cognito user pool?

Using Amazon Pinpoint Analytics, you can track Amazon Cognito user pools sign-ups, sign-ins, failed authentications, daily active users (DAUs), and monthly active users (MAUs). You can also set up user attributes specific to your app using the AWS Mobile SDK for Android or AWS Mobile SDK for iOS. Those can then be used to segment your users in Amazon Pinpoint and send them targeted push notifications.

Link- https://docs.aws.amazon.com/cognito/latest/developerguide/user-pool-settings-analytics.html