clearChatCount function
Implementation
Future<String?> clearChatCount() async{
var user = FirebaseAuth.instance.currentUser;
if (user == null)
return "not register";
try{
FirebaseFirestore.instance.collection("chat").doc(user.uid).set({
"unread_chat": chatCount,
}, SetOptions(merge: true));
}catch(ex){
return "clearChatCount " + ex.toString();
}
return null;
}