Token field has become deprecated. Google recommends switching to Firebase ID (fid). At the moment, in the token field you can transfer a fid (as written in the documentation but not yet verified), but in the future the token field will be deleted.
https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages
https://firebase.google.com/docs/projects/manage-installations
Token field has become deprecated. Google recommends switching to Firebase ID (fid). At the moment, in the token field you can transfer a fid (as written in the documentation but not yet verified), but in the future the token field will be deleted.
https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages
https://firebase.google.com/docs/projects/manage-installations