cache userId so its not required

[todo]

DJApp/app/src/main/java/com/mfriend/djapp/spotifyapi/SpotifyService.kt

Lines 35 to 40 in f80a15f

	* TODO cache userId so its not required
	*/
	@Headers("Content-Type: application/json", "Accept: application/json")
	@POST("users/{user_id}/playlists")
	suspend fun createPlaylist(@Body playlist: PlaylistDTO, @Path("user_id") userId: String): Playlist

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This issue was generated by todo based on a TODO comment in f80a15f when #12 was merged. cc @mrf7.

[mrf7]

Duplicate