Make sure you run the upload command for your GCM api key (for Android obviously), I think there is something for APN also. It took me awhile to find that step in the docs and digging around but it’s there somewhere. I wish I could find the link but I don’t have it handy. Sorry @hassan
Also, you might want to handle the other error in your logs for the users/identify request. I think you’ll want that working so you have users in Ionic.IO that you can configure push messages for easily.