In long : I would like to create an application to receive just like Facebook, and I face a problem. When I login with multiple account on a single device, I receive multiple notification for single push. I couldn't find a way to remove certain user&device, so I decided to make them subscribe to a channel once they log in and unsubscribe from it for logout. I cannot find a button to remove channel that are no longer in need.
Anyonce face this problem before, or have any suggestion for me?