Upsert FCM token
Upserts a Firebase Cloud Messaging token for the caller. Dedupes on token; if token exists, updates last_used_timestamp. | (FirebaseCloudMessagingTokenClientCreate1) -> (UserPrivateData1)
Upserts a Firebase Cloud Messaging token for the caller. Dedupes on token; if token exists, updates last_used_timestamp. | (FirebaseCloudMessagingTokenClientCreate1) -> (UserPrivateData1)
Bearer authentication of the form Bearer <token>, where token is your auth token.
Must be a string starting with user_