[KF-379] Add missing configuration.

src/main/java/com/kuflow/rest/client/KuFlowRestClient.java

@@ -13,6 +13,7 @@
 import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
 import com.kuflow.rest.client.controller.AuthenticationApi;
+import com.kuflow.rest.client.controller.PrincipalApi;
 import com.kuflow.rest.client.controller.ProcessApi;
 import com.kuflow.rest.client.controller.TaskApi;
 import com.kuflow.rest.client.feign.KuFlowFormEncoder;
@@ -41,6 +42,8 @@ public class KuFlowRestClient {
 
     private final AuthenticationApi authenticationApi;
 
+    private final PrincipalApi principalApi;
+
     private final ProcessApi processApi;
 
     private final TaskApi taskApi;
@@ -89,6 +92,17 @@ public KuFlowRestClient(KuFlowRestClientProperties properties) {
                 .requestInterceptor(authRequestInterceptor)
                 .target(AuthenticationApi.class, properties.getEndpoint());
 
+        this.principalApi =
+            Feign
+                .builder()
+                .encoder(encoder)
+                .decoder(decoder)
+                .logger(new Slf4jLogger(PrincipalApi.class))
+                .logLevel(logLevel)
+                .options(options)
+                .requestInterceptor(authRequestInterceptor)
+                .target(PrincipalApi.class, properties.getEndpoint());
+
         this.processApi =
             Feign
                 .builder()
@@ -116,6 +130,10 @@ public AuthenticationApi getAuthenticationApi() {
         return this.authenticationApi;
     }
 
+    public PrincipalApi getPrincipalApi() {
+        return this.principalApi;
+    }
+
     public ProcessApi getProcessApi() {
         return this.processApi;
     }