get_playlist doen't return info about playlist author

[kutermak]

Describe the bug

In previous versions of the library 'get_playlist' method returned playlist author info as well. Looked like:

            "author": [
                {
                    "name": "redditEDM",
                    "id": "UCaTrZ9tPiIGHrkCe5bxOGwA"
                }

But in newest version I can't get it by this method. There are just nothing about author

Am I doing something wrong?

To Reproduce
Steps to reproduce the behavior:

1. call get_playlist for any existing playlist
2. try to get author info author_name = result['author']
3. See error

[sigma67]

Please include the error message