Apple Music Migration What’s the most efficient way to replicate my Apple Music library on a different account?

I was thinking of creating a playlist with all my library and then sharing this playlist with the other account, however adding the tracks to the playlist seems like a very manual process and I have over 4000 tracks in my library. 

Any ideas would be greatly appreciated.
Click on the first song in your library. 
Scroll down and shift-click on the last song in the library. 
Now everything is selected. 
Two-finger tap on any of the songs to show the context menu 
Select “add to playlist”.