Adding Google GCM Api Key Azure Notification Hub Error

Question

We are trying to add our GCM API key to the azure notification hub and we are receiving the following error:

SubCode=40000. Failed to validate credentials with GCM.

Answer 1

I recently had this problem and what I found was that I needed to go to the new firebase console, import my existing google project.

Once I had done that I could go to the settings cog in the top left->project settings. Then click on the cloud messaging tab then get the new server key. Once I entered that I was good to go in the notification hub.