My Ionic plugin is already integrated with Firebase and One Signal, I can already work with login and password and send notifications.
My problem is customizing notifications.
In the sound field, I put the path to the file in three ways and none worked
1 - <project-root>/platforms/android/res/raw/sound.ogg
2 - /platforms/android/res/raw/sound.ogg
2 - platforms/android/res/raw/sound.ogg
I made it the way it is in the documentation.