sample-cognito.js

function getCognitoCreds() {
      console.log("starting function getCognitoCreds");
      var cognitoUser = cognitoFactory.getCognitoUser();
      cognitoUser.getSession(function(err, session) {
        if (err) {
          console.log(err, err.stack);
          console.log("error getting the session");
        } else {
          if (session.isValid() === false) {
            console.log("session is not valid");
          } else {
            console.log("session is valid");
            console.log(session.getIdToken().getJwtToken());
            console.log(AWS.config.credentials);
            AWS.config.region = 'us-east-1';
            AWS.config.credentials = new AWS.CognitoIdentityCredentials({
              IdentityPoolId : 'us-east-1:7a697caa-e384-43c1-95fb-00c202418473', // your identity pool id here
              Logins : {
                'cognito-idp.us-east-1.amazonaws.com/us-east-1_e6xaq4Ewi' : session.getIdToken().getJwtToken()
              }
            });
            AWS.config.credentials.get();
            var cognitosync = new AWS.CognitoSync();
            var params = {
              IdentityPoolId: 'us-east-1:7a697caa-e384-43c1-95fb-00c202418473' /* required */
            };
            cognitosync.describeIdentityPoolUsage(params, function(err, data) {
              if (err) console.log(err, err.stack); // an error occurred
              else     console.log(data);           // successful response
            });
            console.log(AWS.config.credentials);
          }
        }
      });
    }