We are receiving https://android.googleapis.com/gcm/send as endpoint when some android users registers to receive push messages. Problem is the registration info we get comes with no keys.
On most of the clients we get the last endpoint (https://fcm.googleapis.com/fcm/send) with keys so we can send notifications with no problem.
Is there a way to send push notifications to the android.googleapis.com/gcm/send endpoint with no user keys?
Some user agent examples where we get no keys are:
Mozilla/5.0 (Linux; Android 4.4.4; XT1032 Build/KXB21.14-L1.40) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.91 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 6.0.1; Z981 Build/MMB29M) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.91 Mobile Safari/537.36