public Version AddVersion(string name, IFormFile file)
        {
            Material   material   = _context.Materials.Include(p => p.Versions).FirstOrDefault(p => p.Name == name);
            FileLoader fileLoader = new FileLoader(_context, _config);

            return(fileLoader.AddFile(material, file));
        }
        public Version AddMaterial(Material material, IFormFile file)
        {
            FileLoader fileLoader = new FileLoader(_context, _config);

            return(fileLoader.AddFile(material, file));
        }