Currently FCM server provides these raw server protocol:
- FCM HTTP v1 API
- Legacy HTTP protocol
- Legacy XMPP Protocol
I using new HTTP v1 API but I find only one endpoint for send messages in this api
https://fcm.googleapis.com/v1/projects/project_id/messages:send
I need to sign a device on a topic. But I find only legacy http endpoint
https://iid.googleapis.com/iid/v1/nKctODamlM4:CKrh_PC8kIb7O...clJONHoA/rel/topics/movies
with other Authorization key. Is it possible to subscribe device to a topic using new HTTP v1 api.