lambda.js

    var params = {
      TableName: 'ionic-mobile-hub-tasks'
    };

    dynamo.describeTable(params, function(err, data) {
      if (err) {
        console.log(err); // an error occurred
      }
      else {
        console.log(data.Table.ItemCount); 
         var responseBody = {
          received: true,
          itemCount: data.Table.ItemCount
        };
        .
        .
        .
      }
    });