Improve register_node()

Author: bouwew

plugwise_usb/network/__init__.py

@@ -153,10 +153,11 @@ async def register_node(self, mac: str) -> bool:
 
         try:
             address = await self._register.register_node(mac)
-            return await self._discover_node(address, mac, None)
         except (MessageError, NodeError) as exc:
             raise NodeError(f"{exc}") from exc
 
+        return await self._discover_node(address, mac, None)
+
     async def clear_cache(self) -> None:
         """Clear register cache."""
         await self._register.clear_register_cache()