deleteChat method
Implementation
Future<void> deleteChat({
required String uid,
required String chatId,
required int lastMessageCreatedAt,
}) async {
final _chatRef = PeamanReferenceHelper.chatDoc(chatId: chatId);
await _chatRef.update({
'hidden_to_user_ids': FieldValue.arrayUnion([uid]),
'z_${uid}_start_after': lastMessageCreatedAt,
});
}