tasks.ts

  deleteTask(task, index) {
    let self = this;
    this.db.getDocumentClient().delete({
      'TableName': self.taskTable,
      'Key': {
        'userId': AWS.config.credentials.identityId,
        'taskId': task.taskId
      }
    }).promise().then((data) => {
      this.items.splice(index, 1);
    }).catch((err) => {
      console.log('there was an error', err);
    });
  }