private void SetAuthenticationCookie(Usuario usuario)
 {
     var ticket = new FormsAuthenticationTicket(
             1,
             usuario.Codigo.ToString(),
             DateTime.Now,
             DateTime.Now.AddMinutes(FormsAuthentication.Timeout.TotalMinutes),
             false,
             usuario.ToString(),
             FormsAuthentication.FormsCookiePath
         );
     var encryptedTicket = FormsAuthentication.Encrypt(ticket);
     var cookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket)
     {
         HttpOnly = FormsAuthentication.RequireSSL,
         Path = FormsAuthentication.FormsCookiePath,
         Domain = FormsAuthentication.CookieDomain
     };
     Response.AppendCookie(cookie);
     //FormsAuthentication.SetAuthCookie(usuario.User, false);
 }