Use long

WebApi/Endpoints/PlayListEndpoints.cs

@@ -74,7 +74,7 @@ public static class PlayListEndpoints
 
     private static async Task<IResult> GetPlayListsByUserId(
         IMediator mediator,
-        Guid userId,
+        long userId,
         CancellationToken cancellationToken,
         string? name,
         int pageNumber = 1,

WebApi/Endpoints/TrackEndpoints.cs

@@ -83,7 +83,7 @@ public static class TrackEndpoints
 
     private static async Task<IResult> GetTracksByUserId(
         IMediator mediator,
-        Guid userId,
+        long userId,
         CancellationToken cancellationToken,
         string? name,
         int pageNumber = 1,

WebApi/Endpoints/UserEndpoints.cs

@@ -43,7 +43,7 @@ public static class UserEndpoints
 
     private static async Task<IResult> GetUserById(
         IMediator mediator,
-        Guid id,
+        long id,
         CancellationToken cancellationToken)
     {
         var result = await mediator.Send(new GetUserByIdQuery(id), cancellationToken);