private async void OnSendInitialMessagePressed(object sender, EventArgs e)
{
string recipientUuid = RecipientUuid.Text;
string messageText = Message.Text;
ChatPackage chatPackage = await _connection.GetChatPackage(recipientUuid);
MetaMessage initialMessage = MessageUtils.ComposeInitialMessage(recipientUuid, chatPackage, messageText);
await _connection.SendMessageAsync(initialMessage);
}