def create_user_playlist(user_id, name, is_public = true)
      run(:post, "/v1/users/#{user_id}/playlists", [201], JSON.dump(name: name, public: is_public), false)
    end
def create_user_playlist(user_id, name, is_public = true)
      run(:post, "/v1/users/#{user_id}/playlists", [201], JSON.dump(name: name, public: is_public), false)
    end
Create a playlist for a Spotify user. The playlist will be empty until you add tracks.

 Requires playlist-modify-public for a public playlist.
 Requires playlist-modify-private for a private playlist.