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Have you written the call to register for push in your app code? Does it give any error on execution?
You can find the REST API documentation for this call here: http://devcenter.kinvey.com/rest/guides/push#Registeringadevice
I'm using Delphi to create an app. I've managed to get the device to create a user in the Kinvey user database, however when doing this, the push notification field (e.g. _messaging), is blanked. Where can I find this value on android? Or is it something sent back from the server?