public User CreateUser(string name, string login, string pass) { ISingleton instSingle = SingletonTXT.getInstance(); if (name != "" && login != "" && pass != "") { if (instSingle.FindLogin(login) != null) { throw new Exception("Login já existente"); } else { User newUser = new User(name, login, pass); instSingle.CreateUser(newUser); return(newUser); } } throw new Exception("Entrada Inválida"); }