Adding headers to a URL poll request

Is there a special parameter I can pass in if I want to add a custom header to the URL request?

Maybe something on the lines of: 
```
this.get('poll').setup({
      name: 'test',
      resource_name: 'test-test',
      url: `${ENV.API_HOST}/${ENV.API_NAMESPACE}/url`,
      params: { 'include[]': 'files' },
      header: { Authorizaton: 'hello_world' }
    });
```