I'd like to add author login and html_url when generating a changelog from issues or PRs. Here is what I'd like to be able to write in my.grenrc.js:

module.exports={"template":{issue:"- {{name}} [{{text}}]({{url}}) by [@{{user_login}}]({{user_url}})"}}

As far as I understand there are nouser_login anduser_url (or similar) variables I could use.