Update docs

README.md

@@ -160,7 +160,7 @@ After restarting your application, you should see an "aicore" entry in the `VCAP
 
 ```java
 Destination destination = DestinationAccessor.getDestination("my-aicore");
-ApiClient client = Core.getClient(destination);
+ApiClient client = new AiCoreService().withDestination(destination);
 ```
 
 </details>
@@ -239,7 +239,7 @@ For more detailed information and advanced usage, please refer to the following:
 To add a header to AI Core requests, use the following code:
 
 ```java
-ApiClient client = Core.getClient().addDefaultHeader("header-key", "header-value");
+ApiClient client = new AiCoreService().client().addDefaultHeader("header-key", "header-value");
 DeploymentApi api = new DeploymentApi(client);
 ```
 

docs/guides/AI_CORE_DEPLOYMENT.md

@@ -67,7 +67,7 @@ In addition to the prerequisites above, we assume you have already set up the fo
 Use the following code snippet to create a deployment in SAP AI Core:
 
 ```java
-var api = new DeploymentApi(getClient());
+var api = new DeploymentApi(new AiCoreService().client());
 var resourceGroupId = "default";
 
 AiDeploymentCreationRequest request =
@@ -86,7 +86,7 @@ Refer to the [DeploymentController.java](../../sample-code/spring-app/src/main/j
 AiDeploymentCreationResponse deployment; // provided
 String deploymentId = deployment.getId();
 
-var api = new DeploymentApi(getClient());
+var api = new DeploymentApi(new AiCoreService().client());
 var resourceGroupId = "default";
 
 if (deployment.getStatus() == AiExecutionStatus.RUNNING) {