commands.Context object to extract the author id

[sxliang3093]

Description of the changes

I passed a commands.Context object to extract the author id. I changed the arguments of the autoplay function to encompass this change. This is for issue #6281

Closes #6281

Have the changes in this PR been tested?

No

[aikaterna]

Check out the additional context section I wrote on the linked issue. This probably isn't the way this should be resolved.

[Flame442]

I know this is still a draft, but here's some tips about what is currently missing to get you on the right track:

• You aren't actually passing ctx to the autoplay method, you changed its signature without changing any of the places that method is called.
  • This logic wouldn't work for resuming autoplay on bot start, not from a command.
  • Additionally, the notes of the issue you are resolving request a different solution for this issue:

    The fact that user playlists don't work for auto play is intentional - because auto play is a guild level feature meaning guild and global scoped playlists should work for it, but user not so, as we may exposing user data to users in a server that the playlist author/manager is no longer in.
    There should be an error show to the user when trying to set a user scoped playlist as an autoplay playlist.

• You need to use the black autoformatter to style the updated code, in accordance with the CONTRIBUTING.MD file.

[Kowlin]

Due to the lack of activity on this PR, I'm gonna go ahead and close this.