Use long

Application/PlayLists/Commands/CreatePlayListCommand.cs

@@ -5,7 +5,7 @@ using Musify.Application.PlayLists.Responses;
 namespace Musify.Application.PlayLists.Commands
 {
     public record CreatePlayListCommand(
-        Guid UserId,
+        long UserId,
         string Name,
         string Description,
         Guid? PictureIntentId)

Application/PlayLists/Commands/DeletePlayListCommand.cs

@@ -3,6 +3,6 @@ using Mediator;
 
 namespace Musify.Application.PlayLists.Commands
 {
-    public record DeletePlayListCommand(Guid UserId, Guid PlayListId)
+    public record DeletePlayListCommand(long UserId, Guid PlayListId)
         : ICommand<Result>;
 }

Application/PlayLists/Commands/RequestPlayListPictureUploadCommand.cs

@@ -5,7 +5,7 @@ using Musify.Application.PlayLists.Responses;
 namespace Musify.Application.PlayLists.Commands
 {
     public record RequestPlayListPictureUploadCommand(
-        Guid UserId,
+        long UserId,
         string FileType,
         string ContentType,
         long? ExpectedSizeBytes = null)

Application/PlayLists/Commands/UpdatePlayListCommand.cs

@@ -5,7 +5,7 @@ using Musify.Application.PlayLists.Responses;
 namespace Musify.Application.PlayLists.Commands
 {
     public record UpdatePlayListCommand(
-        Guid UserId,
+        long UserId,
         Guid PlayListId,
         string? NewName,
         string? NewDescription,