public async Task <IActionResult> Upload()
        {
            try
            {
                var        file   = Request.Form.Files[0];
                List <int> idUser = new List <int>();
                Request.Form.Keys
                .Where(n => n.StartsWith("idUser"))
                .ToList()
                .ForEach(x => idUser.Add(int.Parse(Request.Form[x])));

                if (file.Length > 0)
                {
                    using (var ms = new MemoryStream())
                    {
                        file.CopyTo(ms);
                        var    fileBytes = ms.ToArray();
                        string s         = Convert.ToBase64String(fileBytes);
                        // obter Usuário
                        try
                        {
                            _service.SalvarImagemPerfil(idUser.FirstOrDefault(), s);
                            return(Ok());
                        }
                        catch (BusinessException e)
                        {
                            if (e.Message.Equals("user not found"))
                            {
                                return(Ok("user not found"));
                            }
                            else if (e.Message.Equals("update failed"))
                            {
                                return(BadRequest());
                            }
                        }
                        catch (DbConcurrencyException e)
                        {
                            return(this.StatusCode(StatusCodes.Status500InternalServerError, "Banco de dados Falhou, pelo motivo: {0}" + e));
                        }
                    }
                }
            }
            catch (System.Exception e)
            {
                return(this.StatusCode(StatusCodes.Status500InternalServerError, e));
            }

            return(BadRequest("Erro ao tentar realizar Upload"));
        }