private void SendEnterRoom()
{
errorText.text = "";
bool validRoomTokenField = roomTokenInputField.text.Length != 0;
if (validRoomTokenField)
{
UInt64 roomToken = Convert.ToUInt64(roomTokenInputField.text);
gameSystem.EnteringRoomScreen(username, roomToken);
}
else
{
errorText.text += roomTokenErrorText + "\n";
}
}