Refactor AuthService to use default RestTemplate and ObjectMapper

Replaces constructor-based dependency injection with direct instantiation of RestTemplate and ObjectMapper in AuthService. Simplifies the class by removing the constructor and initializing dependencies inline.

aconnect/src/main/java/com/mfsys/aconnect/client/service/AuthService.java

@@ -19,13 +19,8 @@ public class AuthService {
     @Value("${app.security.uri}")
     private String securityURI;
 
-    private final RestTemplate restTemplate;
-    private final ObjectMapper objectMapper;
-    
-    public AuthService(RestTemplate restTemplate, ObjectMapper objectMapper) {
-        this.restTemplate = restTemplate;
-        this.objectMapper = objectMapper;
-    }
+    private final RestTemplate restTemplate = new RestTemplate();
+    private final ObjectMapper objectMapper = new ObjectMapper();
 
     public Map<String, Object> authenticate(Map<String, String> payload) {
 

aconnect/src/main/java/com/mfsys/aconnect/configuration/config/RestTemplateConfig.java

@@ -0,0 +1,15 @@
+package com.mfsys.aconnect.configuration.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class RestTemplateConfig {
+
+    @Bean
+    public RestTemplate restTemplate() {
+        return new RestTemplate(new HttpComponentsClientHttpRequestFactory());
+    }
+}