public ActionResult DeleteShareUser(FileUserDto input)
        {
            if (fileShareService.DeleteShareUser(input))
            {
                return(Json(new { msg = "success" }));
            }

            return(Json(new { msg = "error" }));
        }
        public bool DeleteShareUser(FileUserDto input)
        {
            var fileUser = _context.FileUsers.FirstOrDefault(f => f.Id == input.Id);

            if (fileUser != null)
            {
                _context.FileUsers.Remove(fileUser);
                _context.SaveChanges();
                return(true);
            }

            return(false);
        }