How to remember & autorefresh login token when using Amazon Web Services Cognito Userpool?

Question

I have built a website that uses AWS Cognito with the Userpool functionality.

If I leave the page, the login is forgotten, and after one hour the token expires.

I'd like the login to be remembered when the user closes their browser and comes back.

I'd also like the auth token to auto refresh instead of just giving errors after one hour.

How can I do this?

Answer 1

The user pool tokens are saved to local storage. And when calling getCurrentUser on a user pool object you can retrieve the last authenticated user object. After that, calling getSession should use the refresh token to retrieve new access tokens if they are expired such as in the example below. In the callback for getSession, you should have a valid session.

var poolData = {
    UserPoolId : '...', // Your user pool id here
    ClientId : '...' // Your client id here
};
var userPool = new AWSCognito.CognitoIdentityServiceProvider.CognitoUserPool(poolData);
var cognitoUser = userPool.getCurrentUser();

if (cognitoUser != null) {
    cognitoUser.getSession(function(err, session) {
        if (err) {
           alert(err);
            return;
        }
        console.log('session validity: ' + session.isValid());
        //You should have a valid session here
    });
}