fix: use correct url

Author: Vinzent03

packages/supabase_flutter/lib/src/platform_http_io.dart

@@ -23,11 +23,10 @@ http.Client getPlatformHttpClient() {
 ///
 /// It may return `null` because the differentiation for the other platforms
 /// is done in [RealtimeClient].
-WebSocketChannel? getPlatformWebSocketChannel(String url) {
+WebSocketChannel Function(String url)? getPlatformWebSocketChannel() {
   if (Platform.isIOS || Platform.isMacOS) {
-    return AdapterWebSocketChannel(
-      CupertinoWebSocket.connect(Uri.parse(url)),
-    );
+    return (String url) =>
+        AdapterWebSocketChannel(CupertinoWebSocket.connect(Uri.parse(url)));
   }
   return null;
 }

packages/supabase_flutter/lib/src/supabase.dart

@@ -120,10 +120,11 @@ class Supabase with WidgetsBindingObserver {
       );
     }
     if (realtimeClientOptions.webSocketTransport == null) {
-      final platformWebSocketChannel = getPlatformWebSocketChannel(url);
+      final platformWebSocketChannel = getPlatformWebSocketChannel();
       if (platformWebSocketChannel != null) {
         realtimeClientOptions = realtimeClientOptions.copyWith(
-            webSocketTransport: (url, headers) => platformWebSocketChannel);
+            webSocketTransport: (url, headers) =>
+                platformWebSocketChannel(url));
       }
     }
     _instance._init(