make UserTokenCallProxy generic

Author: kanat

src/main/java/io/getstream/chat/java/services/framework/UserServiceFactory.java

@@ -17,7 +17,7 @@ public final <TService> TService create(Class<TService> svcClass, UserToken user
     return (TService) newProxyInstance(
         svcClass.getClassLoader(),
         new Class<?>[] { svcClass },
-        new UserTokenCallProxy(retrofit.callFactory(), retrofit.create(svcClass), userToken)
+        new UserTokenCallProxy<>(retrofit.callFactory(), retrofit.create(svcClass), userToken)
     );
   }
 

src/main/java/io/getstream/chat/java/services/framework/UserTokenCallProxy.java

@@ -14,14 +14,14 @@
  * This approach allows per-call authentication without creating multiple OkHttpClient
  * instances, making it suitable for multi-tenant systems with thousands of users.
  */
-class UserTokenCallProxy implements InvocationHandler {
+class UserTokenCallProxy<TService> implements InvocationHandler {
   private static volatile Field rawCallField;
 
   private final Call.Factory callFactory;
-  private final Object delegate;
+  private final TService delegate;
   private final UserToken token;
 
-  UserTokenCallProxy(@NotNull Call.Factory callFactory, @NotNull Object delegate, @NotNull UserToken token) {
+  UserTokenCallProxy(@NotNull Call.Factory callFactory, @NotNull TService delegate, @NotNull UserToken token) {
     this.callFactory = callFactory;
     this.delegate = delegate;
     this.token = token;
@@ -32,7 +32,7 @@ public Object invoke(Object proxy, Method method, Object[] args) throws Throwabl
     Object result = method.invoke(delegate, args);
 
     // If the result is a Retrofit Call, inject the user token
-    if (result instanceof retrofit2.Call) {
+    if (result instanceof retrofit2.Call<?>) {
       return injectTokenIntoCall((retrofit2.Call<?>) result);
     }