How do i utilize the CustomExceptions?

[stijnvddonk]

Hello,

I have the following code:

namespace HDN_Component_App.Application.Components.Commands.UpdateComponent;
public record UpdateComponentCommand : IRequest
{
    public int Id { get; init; }
    public required string Title { get; init; }
}
public class UpdateComponentCommandHandler : IRequestHandler<UpdateComponentCommand>
{
    private readonly IApplicationDbContext _context;

    public UpdateComponentCommandHandler(IApplicationDbContext context)
    {
        _context = context;
    }

    public async Task Handle(UpdateComponentCommand request, CancellationToken cancellationToken)
    {
        var entity = await _context.Components
            .FindAsync(new object[] { request.Id }, cancellationToken);

        Guard.Against.NotFound(request.Id, entity);

        entity.Title = request.Title;

        await _context.SaveChangesAsync(cancellationToken);
    }
}

How do i extend this to utilize the CustomExceptionHandler to return the NotFound instead of a stacktrace?