I am currently using Firebase Cloud Messaging FCM for push notification.
Try to configure the Azure Push Notification for Xamarin Android. I need to place some api key to the azure push notification portal. The portal at the moment refer "Google GCM" and require an API Key.
I use keytool for debug.keystore to get the SHA1 etc and put it in the API Key field in the azure push notification portal
{"error":{"message":"SubCode=40000. Failed to validate credentials with GCM. The remote server returned an error: (401) Unauthorized...
Can anyone tell what does that mean. Am I using the wrong key.