Add legacy interface with deprecation warnings

rcon/__init__.py

@@ -1 +1,27 @@
 """RCON client library."""
+
+from warnings import warn
+
+from rcon.source import rcon as _rcon
+from rcon.source import Client as _Client
+
+
+class Client(_Client):
+    """Backwards compatibility."""
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        warn(
+            'rcon.Client() is deprecated. Use rcon.source.Client() instead.',
+            DeprecationWarning
+        )
+
+
+async def rcon(*args, **kwargs) -> str:
+    """Backwards compatibility."""
+
+    warn(
+        'rcon.rcon() is deprecated. Use rcon.source.rcon() instead.',
+        DeprecationWarning
+    )
+    return await _rcon(*args, **kwargs)