I am currently trying to make a new destination for calling the firebase cloud messaging api and sending push notifications. The reason for that is because i do not have any backend where i can store my client secrets and other sensitive data i want to take advantage of the sap btp features. When i configure everything as of following this link as well https://developers.sap.com/tutorials/btp-sdm-gwi-create-destination.html
i still get an error that i am not authorized consuming the destination.
What is wrong and do i need additional configurations?