title: How to get extra attributes of a user in user pool in AWS Cognito
body: <p>I'm using amazon-cognito-identity-js to authenticate my user pool users.And after authenticating it's passing access token, id token and refresh token.And also the user id is there(user's id in user pool).Is there any way to get user attributes like(nick name,birthday,address) with these tokens or the with the user id in aws-cognito</p>