[Support] Get Playlist Creator

[Terax235]

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.10.01. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2017.10.01

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

Description of your issue, suggested solution and other information

Is it possible to get a Playlist Creator with YoutubeDL.getInfo() ?
Like, I want to get a Playlist by URL, and then want to get who made the playlist, I have that:

YoutubeDL.getInfo(PLAYLIST_URL, ['--no-warnings', '--force-ipv4'], async (err, info) => {
console.log(info[0].playlist_title)
});

But I didn't found a way on google and the Readme to get a Creator of a Youtube Playlist!

[dstftw]

Not possible. Also no such method exist.
Duplicate of #11427.