public JsonResult SendEmail(string userName)
        {
            var    usuario    = _recuperarSenhaService.SendEmailNewPassword(userName, this.HttpContext.Request.Url.Scheme + "://" + this.HttpContext.Request.Url.Authority);
            string email      = "";
            var    emailSplit = usuario.EMAIL_USUARIO.Split();
            string user       = usuario.EMAIL_USUARIO.Split('@')[0];
            string dominio    = usuario.EMAIL_USUARIO.Split('@')[1];

            for (int i = 0; i < user.ToCharArray().Count(); i++)
            {
                if (i < 3 || i >= (user.ToCharArray().Count() - 2))
                {
                    email += user[i];
                }
                else
                {
                    email += 'x';
                }
            }
            email += "@" + dominio;

            return(Json(new { email = email }, JsonRequestBehavior.AllowGet));
        }