public function sendMessageByUserId($receiverId, $message)
{
if ($conversationId = $this->isConversationExists($receiverId)) {
$message = $this->makeMessage($conversationId, $message);
return $message;
}
$convId = $this->newConversation($receiverId);
$message = $this->makeMessage($convId, $message);
return $message;
}