FileHandler.cs

public class FileHandler : IFileHandler
{
    private readonly TransferzorDbContext _context;
    private readonly IAwsS3FileManager _s3FileManager;

    public FileHandler(
        TransferzorDbContext context,
        IAwsS3FileManager s3FileManager)
    {
        _context = context;
        _s3FileManager = s3FileManager;
    }
}