addnewchatmessage method
Implementation
addnewchatmessage(String chatid, Map<String, dynamic> chat) async {
chats.doc(chatid).collection("messages").add(chat);
chats.doc(chatid).update({
"recentmessages": chat['message'],
"recentsender": chat['sender'],
"recentmessagetime": chat['time'].toString(),
});
}