InApp Billing

Android
1

Hi, I used Plugin.InAppBilling package for implement in app billing feature. Here my code.

public async void Activate()
{
//code here
}

In button click event (touch) i execute this method. But nothing happen.
Any idea.?

public override void Update(GameTime gametime)
{

        var touches = TouchPanel.GetState();

        foreach (var button in _buttons)
        {
            CheckUserInput((Ganitha_Podda_2D.Controls.Button)button, touches);
        }

    }