Use long

Application/Users/Commands/CreateUserCommand.cs

@@ -5,7 +5,7 @@ using Musify.Domain.Entities;
 
 namespace Musify.Application.Users.Commands
 {
-    public record CreateUserCommand(Guid Id,
+    public record CreateUserCommand(long Id,
         string Name,
         string? FirstName,
         string? SecondName)

Application/Users/Queries/GetUserByIdQuery.cs

@@ -4,6 +4,6 @@ using Musify.Application.Users.Responses;
 
 namespace Musify.Application.Users.Queries
 {
-    public record GetUserByIdQuery(Guid Id)
+    public record GetUserByIdQuery(long Id)
         : IQuery<Result<UserApplicationResponse> >;
 }

Application/Users/Responses/UserApplicationResponse.cs

@@ -3,7 +3,7 @@
 namespace Musify.Application.Users.Responses
 {
     public record UserApplicationResponse(
-        Guid Id,
+        long Id,
         string Name,
         string? FirstName,
         string? SecondName,