firebase cloud messaging Unknown name "sound" at 'message.notification':
{
"message": {
"token": "your-token-value",
"notification": {
"title": "Test",
"body": "Test message from server"
},
"android": {
"notification": {
"sound": "default"
}
},
"apns": {
"payload": {
"aps": {
"sound": "default"
}
}
}
}
}