I am testing push notification service. I want to ask a scenario. Lets say I login from a device. I sucessfully register my device to push service with a username. Then, I change my device and login from that device. What push notification does now is: register a new device with same username.So, I see two registry with sameusername on apphq console. Is it normal? Now, if I want to send push notification to user, It will be sended to two device. What should I do?