private void btn_Login_Click(object sender, EventArgs e) { ResetErrors(); string username = input_login.Text; string password = input_password.Text; bool validLogin = InputValidator.VlidateLogin(username); bool validPassword = InputValidator.VlidatePassword(password); if (!validLogin) { OnInvalidUsername(); return; } if (!validPassword) { OnInvalidPassword(); return; } authClient.Login(username, password); }