private List <UserViewModel> GetCustomers()
        {
            List <UserViewModel> result = new List <UserViewModel>();
            var lista = _assistanceService.GetCustomers();

            foreach (var user in lista)
            {
                if (user.CompanyName != null)
                {
                    var userModel = new UserViewModel
                    {
                        CompanyName = user.CompanyName,
                        Username    = user.Username,
                        Enabled     = user.Enabled,
                        ID          = user.ID
                    };

                    result.Add(userModel);
                }
            }

            return(result);
        }